Entries |
Document | Title | Date |
20080204168 | VARIABLE RESONATOR, TUNABLE FILTER, AND ELECTRIC CIRCUIT DEVICE - A variable resonator that comprises a loop line ( | 08-28-2008 |
20080252399 | PASSBAND RESONATOR FILTER WITH PREDISTORTED QUALITY FACTOR Q - A filter for processing an RF signal includes an input port and an output port and a plurality of resonators. The resonators are arranged in a sequentially-coupled arrangement between the input and output ports to affect an RF signal therebetween. Each resonator includes a cavity and resonant element. The resonant elements of at least two resonators are made of two different types of materials to effect higher and lower Q factors for the resonators. The resonators are arranged to provide at least one resonator having a lower Q factor proximate one of the input and output ports while the higher Q factor resonator is provided proximate the inside of the sequentially-coupled arrangement. | 10-16-2008 |
20090021327 | ELECTRICAL FILTER SYSTEM USING MULTI-STAGE PHOTONIC BANDGAP RESONATOR - An electrical filter system includes a transmission line and three or more separated photonic bandgap (PBG) structures positioned successively therealong. | 01-22-2009 |
20090039982 | Dielectric Resonator, Dielectric Filter and Communication Device - A dielectric resonator is constructed so as to have a substantially cruciform shape in cross section by including four plate components. A first set of opposed plate components have respective first principal center planes separated from each other and substantially parallel with each other. A second set of opposed plate components also have respective second principal center planes separated from each other and substantially parallel with each other. The first principal center planes are orthogonal to the second principal center planes. With this configuration, a TE01δy mode in which an electric-field vector rotates within the first set of opposed plate components and a TE01δz mode in which an electric-field vector rotates within the second set of opposed plate components are coupled. | 02-12-2009 |
20090072927 | TUNEABLE BANDPASS FILTER - A tuneable bandpass filter comprising a plurality of coupled resonators, the filter comprising
| 03-19-2009 |
20090079521 | Bulk Acoustic Wave Resonator - The invention relates to a bulk acoustic wave filter comprising at least one first resonator and at least one second resonator. A longitudinal acoustic mode for which normal dispersion is adjusted in the first resonator and abnormal dispersion is adjusted for the second resonator by selecting the material and the relative layer thicknesses, is able to propagate in the resonators, thus making it possible to improve especially the power compatibility of the filter at the higher frequency edge of the passband thereof. | 03-26-2009 |
20090091405 | RESONATOR, METHOD FOR MANUFACTURING FILTER BY USING RESONATOR AND FILTER MANUFACTURED BY THE SAME METHOD - There are provided a resonator for use in a filter, which interprets and reduces intermodulation distortion by analyzing characteristics of current density occurring at resonance and linear and nonlinear characteristics of the filter, a method for manufacturing filters by using the resonator and a filter manufactured by the method. The resonator has a ratio of an inside diameter to an outside diameter belonging to a range which is larger than about 1:3 and smaller than or equal to about 1:3.75 and its length (H) is about λ/4, wherein λ is a wavelength of a plane wave provided to the resonator. By employing the method, it is possible to effectively design the filters through the use of a circuitry and structural approach with breaking from a conventional approach depending on local and minute processing steps when manufacturing the filters. | 04-09-2009 |
20090128261 | FILTER CIRCUIT, RADIO COMMUNICATION EQUIPMENT, AND SIGNAL PROCESSING METHOD - There is provided a signal processing method comprising: inputting an input signal having a certain band; dividing said input signal into a signal in a stop band and a signal in a pass band outside said stop band with a use of a band stop filter which has a center frequency of said input signal inside said stop band and includes a first resonator having said center frequency as a resonance frequency; extracting a signal in a desired band from the signal in said pass band with a use of a plurality of second resonators; decomposing the signal in said stop band into signals whose degeneracy of said resonance frequency are released; combining a degeneracy-released signals and the signal in said desired band to obtain a combined signal; and outputting the combined signal. | 05-21-2009 |
20090146761 | RF monoblock filter with recessed top pattern and cavity providing improved attenuation - An electrical signal filter defined by a block of dielectric material with a top surface, a bottom surface, side surfaces, and through-holes extending between the top and bottom surfaces. In one embodiment, a plurality of walls extend outwardly from the top surface to define a peripheral rim and filter cavity. A pattern of metallized and unmetallized areas is defined on selected surfaces of the block including an area of metallization that covers at least a portion of the top surface and at least one of the walls to define at least one input/output electrode on the wall. In one embodiment, a pair of input/output electrodes are formed on a pair of posts defined on one of the walls and the filter is adapted for mounting to a printed circuit board with the rim of the walls against the board and the posts coupled to respective input and output pads on the board. | 06-11-2009 |
20090153270 | High-pass filter - The invention relates to a high-pass filter comprising a signal line with several capacitors connected in series as well as a ground line, wherein several inductors are connected between the signal line and the ground line. In order to configure the high-pass filter as a coaxial construction it is suggested in accordance with the invention that the signal line form an inner conductor and the ground line an outer conductor of a coaxial conductor, between which an insulation layer is arranged, and that the inductors be designed as discrete components which are arranged at a distance to one another and between which at least one impedor is connected. | 06-18-2009 |
20090195331 | FILTER - A filter includes: a container; at least one barrier, an input device and an output device. The at least one barrier divide the container into at least two resonant cavities. Each resonant cavity has a harmonic oscillators disposed therein. At least one of the harmonic oscillators comprises a supporter and a carbon nanotube structure disposed on a surface of the supporter. | 08-06-2009 |
20090195332 | WIRELESS NON-RADIATIVE ENERGY TRANSFER - The electromagnetic energy transfer device includes a first resonator structure receiving energy from an external power supply. The first resonator structure has a first Q-factor. A second resonator structure is positioned distal from the first resonator structure, and supplies useful working power to an external load. The second resonator structure has a second Q-factor. The distance between the two resonators can be larger than the characteristic size of each resonator. Non-radiative energy transfer between the first resonator structure and the second resonator structure is mediated through coupling of their resonant-field evanescent tails. | 08-06-2009 |
20090195333 | WIRELESS NON-RADIATIVE ENERGY TRANSFER - The electromagnetic energy transfer device includes a first resonator structure receiving energy from an external power supply. The first resonator structure has a first Q-factor. A second resonator structure is positioned distal from the first resonator structure, and supplies useful working power to an external load. The second resonator structure has a second Q-factor. The distance between the two resonators can be larger than the characteristic size of each resonator. Non-radiative energy transfer between the first resonator structure and the second resonator structure is mediated through coupling of their resonant-field evanescent tails. | 08-06-2009 |
20090212885 | RESONATOR AND BANDPASS FILTER HAVING OVERLAY ELECTROMAGNETIC BANDGAP (EBG) STRUCTURE, AND METHOD OF MANUFACTURING THE RESONATOR - Provided is an Electromagnetic Bandgap (EBG) structure, particularly, a resonator and a bandpass filter having an overlay EBG structure, and a method of manufacturing the resonator. The resonator is manufactured by forming a transmission line and ground plates on a substrate, arranging a plurality of reflector units at regular intervals along the longitudinal direction of the transmission line, and removing at least one reflector among the plurality of reflectors, thus forming a common resonating mode. Therefore, since reflector units constructing capacitance components are separated from a substrate, it is possible to prevent electromagnetic waves from leaking out of the substrate and ensure a high Q characteristic in a high frequency environment due to a resonating unit formed between the reflector units. | 08-27-2009 |
20090231062 | Filter with multiple shunt zeros - A filter including at least two resonator through-holes defining apertures in the top surface surrounded by respective plates which in combination with associated through-holes define primary and secondary shunt zeros providing low ripple and high rejection adjacent the bandpass. In one embodiment, the through-hole of the primary shunt zero is coupled directly to an input/output pad, while the through-hole of the secondary shunt zero is indirectly coupled to the input/output pad via a coupling bar extending between the input/output pad and the secondary shunt zero. In another embodiment, the secondary shunt zero may be coupled directly to the input/output pad. In a further embodiment, additional resonator through-holes in combination with associated plates define additional shunt zeros coupled directly or indirectly to the input/output pad. | 09-17-2009 |
20090256651 | TRIPLE-MODE CAVITY FILTER HAVING A METALLIC RESONATOR - A triple-mode filter is disclosed, the triple-mode filter including a cavity for confining electromagnetic waves and a metallic block acting as a resonator within that cavity. The metallic block does not contact the conductive walls of the cavity, but is instead suspended by a support element. Triple-mode resonators may be combined to produce bandpass filters having three or more poles. In other configurations, triple-mode cavity metallic resonators may be coupled to triple-mode cavity ceramic resonators or to combline resonators to achieve various filtering functions and performances suitable for different applications. | 10-15-2009 |
20090309678 | CAVITY MICROWAVE FILTER ASSEMBLY WITH LOSSY NETWORKS - A cavity microwave filter assembly for filtering an electromagnetic wave including a plurality of cavity resonator assemblies, where each cavity resonator assembly has a bottom and including at least one lossy element for electromagnetically coupling two elements of the filter assembly, where at least one element is a cavity resonator assembly. The lossy elements provide attenuation in the loss variation of the filter and sharper slopes resulting in an improved Q factor for the filter. A method for realizing lossy elements as resistors requires determining an equivalent circuit model that can be manufactured using resistors, coupling elements, and transmission lines. The method includes representing the resistive element with a resistor, unity admittance inverters and coupling elements and then scaling to determine the resistor and coupling values. The method further includes replacing the admittance inverters with transmission lines of the appropriate length to account for the specific design of the filter. | 12-17-2009 |
20100013576 | Switchable bandpass filter having stepped-impedance resonators loaded with diodes - A switchable bandpass filter includes a first stepped-impedance resonator, a second stepped-impedance resonator wirelessly coupled to the first stepped-impedance resonator, and a first diode connected to one end of the second stepped-impedance resonator. | 01-21-2010 |
20100045406 | RF FILTER MODULE - The present invention relates to a RF filter module adapted to be connected between an electric circuit and a least one antenna element. The filter module comprises a cavity within a filter housing having a housing wall, and at least one resonator being provided inside said cavity. The housing wall of the filter housing is provided with at least one aperture allowing RF signals to be coupled between an externally arranged non penetrating coupling part and the resonator (s) provided inside said cavity. The invention also relates to a RF filter arrangement and a system for communicating RF signals. | 02-25-2010 |
20100097162 | APPARATUS FOR COUPLING COMBLINE AND CERAMIC RESONATORS - An apparatus for coupling a combline resonator and a ceramic resonator, including one or more of the following: a housing; a combline resonator in the housing; a ceramic resonator in the housing, the ceramic resonator having a stem portion and a mushroom portion; a ridge extending between the combline resonator and the ceramic resonator, the ridge passing between the mushroom portion of the ceramic resonator and the housing, wherein a coupling is obtained between an electrical field of the combline resonator and an electrical field of the ceramic resonator. | 04-22-2010 |
20100134212 | ELECTROMAGNETIC BANDGAP STRUCTURE AND PRINTED CIRCUIT BOARD - An electromagnetic bandgap structure includes: first conductive plates, placed on a first planar surface; second conductive plates, placed on a second planar surface; a first conductive trace, electrically connecting any two adjacent first conductive plates with each other on the first planar surface, in which the two adjacent first conductive plates are in a first direction; a second conductive trace, electrically connecting any two adjacent second conductive plates with each other on the second planar surface, in which the two adjacent second conductive plates are in the first direction; a first stitching via, electrically connecting any two adjacent conductive portions lined up in a direction different from the first direction on the first planar surface with each other; and a second stitching via, electrically connecting any two adjacent conductive portions lined up in a direction different from the first direction on the second planar surface with each other. | 06-03-2010 |
20100134213 | ELECTROMAGNETIC BANDGAP STRUCTURE AND CIRCUIT BOARD - An electromagnetic bandgap structure includes: first conductive plates, placed on a first planar surface, in which the first conductive plates are lined up in a first direction; second conductive plates, placed on a second planar surface and arranged at an area corresponding to an area in which the first conductive plates are disposed, in which the second conductive plates are lined up in the first direction; a first stitching via, electrically connecting any two adjacent conductive portions with each other and in which the two adjacent conductive portions are lined up in a direction that is different from the first direction on the first planar surface; and a second stitching via, electrically connecting any two adjacent conductive portions with each other and in which the two adjacent conductive portions are lined up in a direction that is different from the first direction on the second planar surface. | 06-03-2010 |
20100308937 | Filter Assembly - An object of the present invention is to provide an improved and simplified filter assembly. The object is achieved by a dielectric rod ( | 12-09-2010 |
20110001583 | FILTER APPARATUS AND METHOD - A filter includes a cross-coupling link which includes a crossbar, a first vertical support attached to one end of the crossbar, a second vertical support attached to another end of the crossbar, a first coupling arm attached to the first vertical support, a second coupling arm attached to the second vertical support, a first adjustable support attached to the first coupling arm at one end and grounded at another end, and a second adjustable support attached to the second coupling arm at one end and grounded at another end. | 01-06-2011 |
20110068882 | FILTER AND AMPLIFYING CIRCUIT - There is provided a filter which includes a transmission line, a stub branched from the transmission line, the stub electrically coupled with the transmission line, and a resonator configured to electromagnetically couple with the stub and to resonate at an odd harmonic frequency of a fundamental wave, the fundamental wave propagating through the transmission line. | 03-24-2011 |
20110084782 | ELECTROMAGNETIC FILTER AND ELECTRONIC DEVICE HAVING SAME - The electromagnetic filter according to the present invention includes a shield opening | 04-14-2011 |
20110102109 | THERMALLY EFFICIENT DIELECTRIC RESONATOR SUPPORT - Various exemplary embodiments relate to a temperature compensation structure for use in a dielectric resonator that permits a support to be thermally efficient in rapidly transferring heat generated by a central puck in the resonator. The temperature compensation structure may have an extension shaped to promote heat from the puck into the support, thereby permitting high power operation of the dielectric resonator without overheating. | 05-05-2011 |
20110115574 | VARIABLE RESONATOR AND VARIABLE FILTER - A switch is replaced with a parallel resonant circuit | 05-19-2011 |
20110298566 | TE011 CAVITY FILTER ASSEMBLY AND METHOD - A TE011 cavity filter assembly is disclosed. The system includes at least one resonator operating in TE011 mode having a resonant frequency. The at least one resonator may include a cavity comprising an inner diameter and a cavity length. The at least one resonator may also include a first metal disc inside the cavity. The first metal disc may include a disc diameter and a void in the metal disc, which includes a void diameter and a void depth. The inner diameter of the cavity may be greater than the disc diameter creating a gap with a gap width and a gap depth. The TE011 cavity filter assembly may further include positive coupling. | 12-08-2011 |
20110304413 | HIGH FREQUENCY FILTER - A high frequency filter with a wider bandwidth is proposed based on an electromagnetic wave interacted with metamaterial following a left-handed rule and an electromagnetic wave interacted with traditional material following a right-handed rule, and the high frequency filter includes a plurality of filter units arranged in an array and disposed on the same plane, and each filter unit includes a first metal layer, a second metal layer and a dielectric layer, and the first metal layer and the second metal layer are stacked on two opposite sides of the dielectric layer respectively, and the filter is applicable to filtering wave with a frequency of 60 GHz. | 12-15-2011 |
20120007697 | RESONATOR FILTER - A tuneable resonator filter consisting of cavity resonators. In the partition wall separating the successive resonators on the transmission path of a resonator filter there is a coupling opening (CPO) with a typically constant width. The coupling strength between the resonators is adjusted by a tuning element which is supported to the partition wall on the opposite sides of the coupling opening so that it can be moved. The tuning element is conductive and grounded so that the impedance between its ends and the partition wall is low. For moving the tuning element, it is linked by a dielectric rod to an electrically controllable actuator being located on the filter lid. By means of the tuning mechanism the bandwidth of a filter can be set automatically. | 01-12-2012 |
20120019337 | CAVITY FILTER - An cavity filter includes a housing, a plurality of resonators received in the housing, a cover covering the opening, a sliding plate, and a plurality of tuning posts. The housing defines an opening and comprises at least one pair of positioning portions. The plurality of tuning posts is fixed in the cover corresponding to the plurality of resonators. The sliding plate is disposed between the cover and the plurality of resonators, and is slidably positioned at the at least one pair of positioning portions. The sliding plate comprises a plurality of tuning cells and at least one elastic arm. The plurality of tuning cells is coated with a metallic layer and corresponds to the plurality of resonators. The at least one elastic arm extends from the sliding plate and elastically resists the cover. | 01-26-2012 |
20120019338 | COUPLING STRUCTURES FOR MICROWAVE FILTERS - A coupling structure for a microwave filter including at least one coupling rod located adjacent a transformer. | 01-26-2012 |
20120068792 | SUPER Q DUAL MODE CAVITY FILTER ASSEMBLY - A microwave cavity filter is configured for operation in the dual TE | 03-22-2012 |
20120081196 | Microwave Filter with Dielectric Resonator - A filter of longitudinal axis Z includes: at least one resonant cavity delimited by walls made of a material that has a non-zero expansion coefficient; a dielectric resonator mounted in the cavity transversally to the axis Z; a mechanical device for compensating at least one resonance frequency of the cavity as a function of the temperature. The compensation device comprises: at least one rotationally mobile finger for each mode and for each cavity, the mobile finger penetrating to a fixed depth into the cavity via a pivot link, and an external mechanical actuator mounted parallel to the axis Z and mechanically coupled to the mobile finger, the external mechanical actuator being made of a material that has a coefficient of thermal expansion at least five times lower than that of the walls of the filter. | 04-05-2012 |
20120161904 | ULTRA WIDE PASS-BAND, ABSORPTIVE BAND-REJECT FILTER - An ultra wide band-pass, absorptive band-reject filter has a pair of quadrature hybrid couplers cascaded and coupled by a phase shifting element and a matched pair of band-reject filters in two parallel paths. The matched pair of band-reject filters each rejects signals in a desired reject frequency band. The quadrature hybrid couplers each have an insertion loss amplitude crossover for signals propagated to terminals across the coupler that coincides with the reject frequency band. The phase shifting element is configured to have a phase shift of 180 degrees at frequencies in the reject frequency band. In a preferred embodiment, the pair of quadrature hybrid couplers are identical in performance and the band-reject filters are identical in performance with respect to a center frequency fn of the reject frequency band. The absorptive band-reject filter thereby provides an absorptive rejection response in the reject frequency band while a very wide pass-band frequency range is maintained. | 06-28-2012 |
20120169435 | MICROWAVE AND MILLIMETER-WAVE COMPACT TUNABLE CAVITY FILTER - An electrical device that comprises a tunable cavity filter that includes a container and a post. The container encloses a cavity therein, wherein interior surfaces of the container are covered with a metal layer. The post is configured be movable through an opening in the container such that at least a portion of the post is locatable inside of the cavity. | 07-05-2012 |
20120206217 | Band-Elimination Filter - A band-elimination filter (BEF) that includes a coaxial dielectric resonator block, a substrate, and first, second, and third inductance elements. The coaxial dielectric resonator block includes inner conductors and an outer conductor, and forms coaxial dielectric resonators. The first inductance element is between a signal transmission path connected to one of the coaxial dielectric resonators via a series resonant capacitor and a signal transmission path connected to the other one of the coaxial dielectric resonators via a series resonant capacitor. The second inductance element is between one end of the first inductance element and the ground, and the third inductance elements is between the other end of the first inductance element and the ground. | 08-16-2012 |
20120242425 | LIGHTWEIGHT CAVITY FILTER STRUCTURE - Embodiments provide a novel fabrication method and structure for reducing structural weight in radio frequency cavity filters and novel filter structure. The novel filter structure is fabricated by electroplating the required structure over a mold. The electrodeposited composite layer may be formed by several layers of metal or metal alloys with compensating thermal expansion coefficients. The first or the top layer is a high conductivity material or compound such as silver having a thickness of several times the skin-depth at the intended frequency of operation. The top layer provides the vital low loss performance and high Q-factor required for such filter structures while the subsequent compound layers provide the mechanical strength. | 09-27-2012 |
20120249266 | RF FILTER FOR ADJUSTING COUPLING AMOUNT OR TRANSMISSION ZERO - An RF filter, e.g. RF cavity filter for adjusting coupling amount or transmission zero is disclosed. The RF filter includes a housing member in which cavities are defined by walls, resonators located in the cavities, a cover combined with an upper surface of the housing member, a first tuning element inserted into a first cavity of the cavities through the cover, and a second tuning element inserted into a second cavity of the cavities through the cover. Here, the first tuning element and the second tuning element are connected electrically. | 10-04-2012 |
20120293279 | INTEGRATED CAVITY FILTER/ANTENNA SYSTEM - An integrated cavity filter/antenna system includes a substrate, a cavity filter formed in or on the substrate. A first cavity resonator is in or on the substrate that is enclosed by metal walls. At least a second cavity resonator is formed in or on the substrate that is enclosed by metal walls. An inter-resonator coupling structure couples energy between the first cavity resonator and the second cavity resonator. An antenna is integrated with one of the cavity resonators so that the antenna acts as both a port of the cavity filter and as a radiating element for the filter/antenna system. A connector is coupled to one of the cavity resonators for coupling energy into the filter/antenna system. | 11-22-2012 |
20120293280 | WIDE-BAND MULTI-MODE FILTER - A multi-mode filter for realizing wide-band is disclosed. The multi-mode filter includes a housing; a plurality of cavities formed in the housing; a plurality of resonators located in each of the cavities; at least one connector formed through a side wall of the housing; and at least one coupling element connected to the at least one connector in the cavities, the at least one coupling element coupling the at least one connector with at least one of the resonators respectively, wherein each of the at least one coupling element has “T” shape in view of front section and “L” shape in view of side section. | 11-22-2012 |
20120293281 | MULTI MODE FILTER FOR REALIZING WIDE BAND USING CAPACITIVE COUPLING / INDUCTIVE COUPLING AND CAPABLE OF TUNING COUPLING VALUE - A multi-mode filter for realizing wide band using capacitive coupling and inductive coupling and capable of tuning coupling value is disclosed. The multi-mode filter includes a housing; a first cavity and a second cavity formed in the housing; a first resonator located in the first cavity, a second resonator located in the second cavity, a wall configured to separate the first cavity from the second cavity; and a first coupling element, wherein a groove is formed between the housing and the wall, the first coupling element is inserted in the groove in crossing direction to the wall, one part of the first coupling element is disposed in the first cavity, another part of the first coupling element is disposed in the second cavity, and the first coupling element is connected to a ground. | 11-22-2012 |
20120299667 | CAVITY FILTER HAVING FEEDBACK ARRANGEMENT - A cavity filter having two series of resonance chambers bilaterally connected between an antenna port and two opposing signal input/output ports, each series of resonance chambers having the last resonance chamber thereof connected to the antenna port and the first resonance chamber thereof connected between the respective signal input/output port and the associating last resonance chamber to perform cross-coupling feedback, improving the quality of the signal received by the signal receiver using the cavity filter and enhancing signal transmission performance. | 11-29-2012 |
20120299668 | CAVITY FILTER HAVING SURGE SUPPRESS MEANS - A cavity filter includes a base member defining therein a resonant chamber, an antenna port disposed at the center of the resonant chamber, two signal input/output ports respectively disposed at two distal ends of the resonant chamber for signal input/output, a cover member covering the base member, two feedback channels disposed in the base member at two opposite lateral sides relative to the resonant chamber and respectively connected between the signal ports and the antenna port, and wave-absorbing components respectively mounted in the feedback channels for removing surge waves from feedback frequency components in the feedback channels. | 11-29-2012 |
20120306596 | Microwave Filter - A microwave filter for filtering a microwave signal is disclosed. The microwave filter has at least one band edge at a band edge transition frequency. The filter comprises an input port and an output port. The filter also comprises a plurality of single resonators connected in parallel between the input and output ports. The filter further comprises a frequency independent electrical coupling between the input and output ports connected in parallel with the resonators. A subset of the resonators has Q values each of which are at least a factor of three higher than the Qs of each of the remaining resonators. | 12-06-2012 |
20120313732 | CAVITY FILTER WITH HIGH FLATNESS FEEDBACK - A cavity filter having two series of resonance chambers symmetrically and bilaterally connected between an antenna port and two opposing signal input/output ports in a resonant space therein, each series of resonance chambers having the last resonance chamber thereof connected to the antenna port and the first resonance chamber thereof connected to the respective signal input/output port and kept in communication with the associating last resonance chamber through one respective channel and the second resonance chamber thereof kept in communication with the last second resonance chamber thereof through one respective channel to provide cross-coupling feedback, getting better stop-band flatness and improving signal quality. | 12-13-2012 |
20130049891 | FILTER - A multi-mode cavity filter, comprising: at least one dielectric resonator body incorporating a piece of dielectric material, the piece of dielectric material having a shape such that it can support at least a first resonant mode and at least a second substantially degenerate resonant mode; and a coupling structure comprising a patterned conductive layer for at least one of coupling signals to the piece of dielectric material and coupling signals from the piece of dielectric material. | 02-28-2013 |
20130049892 | FILTER - A multi-mode cavity filter, comprising: at least one dielectric resonator body incorporating a piece of dielectric material, the piece of dielectric material having a shape such that it can support at least a first resonant mode and at least a second substantially degenerate resonant mode; a layer of conductive material in contact with and covering the dielectric resonator body; and a coupling structure comprising at least one electrically conductive coupling path for at least one of inputting signals to the dielectric resonator body and outputting signals from the dielectric resonator body, the at least one electrically conductive coupling path being arranged for at least one of directly coupling signals to the first resonant mode and the second substantially degenerate resonant mode in parallel, and directly coupling signals from the first resonant mode and the second substantially degenerate resonant mode in parallel. | 02-28-2013 |
20130049895 | FILTER - A multi-mode cavity filter having a dielectric resonator body incorporating a piece of dielectric material, the piece of dielectric material having a shape such that it can support at least two substantially degenerate resonant modes; and a coupling structure comprising a plurality of independent coupling elements for coupling signals to the piece of dielectric material. | 02-28-2013 |
20130049896 | FILTER - A multi-mode cavity filter includes a dielectric resonator body incorporating a piece of dielectric material, the piece of dielectric material having a shape such that it can support at least two substantially degenerate resonant modes; and a phased array of coupling elements for coupling signals to the piece of dielectric material. | 02-28-2013 |
20130076459 | DUAL MODE DIELECTRIC RESONATOR LOADED CAVITY FILTER - A dual mode dielectric resonator (DR) filter has a first DR, and is configured to operate at a HE12ε mode within a first frequency band while exhibiting a Q factor of no less than 5000. A first characteristic size of the first DR may be substantially similar to a size of a second DR, where the second DR is configured to operate in a conventional DR filter at a HE11δ mode within a second frequency band, the second frequency band being substantially lower than the first frequency band. | 03-28-2013 |
20130162374 | TUNABLE BANDPASS FILTER - A bandpass filter has a combline structure having a plurality of cascaded nodes. A plurality of nodes in the filter are connected both to resonant elements (a.k.a. resonators) and non-resonant elements (including elements having inductances and/or capacitances that do not resonate in a predetermined frequency band of interest). The resonant frequencies of the resonant elements may be adjusted, in order to adjust the location of the center frequency and/or the width of the passband of the filter. The characteristics of the resonant and non-resonant elements are selected such that the poles of the filter, when plotted on the complex plane, move substantially along the imaginary axis when the resonant frequencies are adjusted, without substantial movement along the real axis. The resulting bandpass filter has substantially constant losses and substantially constant absolute selectivity over a relatively wide range of bandwidths. | 06-27-2013 |
20130176088 | TRANSVERSE MAGNETIC MODE DIELECTRIC RESONATOR, TRANSVERSE MAGNETIC MODE DIELECTRIC FILTER, AND BASE STATION - The present invention relates to a resonator and discloses a transverse magnetic mode dielectric resonator, a transverse magnetic mode dielectric filter, and a base station. By using the present invention, good contact between contact surfaces and convenient assembly can be achieved. Moreover, the transverse magnetic mode dielectric resonator according to the embodiments of the present invention has good structure stability, convenient assembly, and strong realizability, thereby being suitable for mass production and having good mass production consistency. | 07-11-2013 |
20130229243 | Tuneable Filter - A tuneable filter comprising
| 09-05-2013 |
20130234807 | CAVITY FILTER WITH RESILIENT MEMBER CONNECTED BETWEEN SLIDER AND DRIVING DEVICE - A cavity filter includes a slider, a driving device, an adapter and a resilient member. The slider is used to slide relative to and couple with a plurality of resonators located in the cavity filter to change a resonating frequency of the cavity filter. The driving device is used to drive the slider slide relative to the plurality of resonators. The adapter is installed between the slider and the driving device. The resilient member is elastically connected between the slider and the adapter and used to absorb vibrations of the driving device to make the slider move on an even keel. | 09-12-2013 |
20130249650 | ELECTRICAL FILTER STRUCTURE - An electrical filter structure for forwarding an electrical signal from a first filter port to a second filter port in a frequency-selective manner includes a filter core structure having a working impedance, wherein the working impedance is different from a first characteristic port impedance of a first filter port, and also different from a second characteristic port impedance of a second filter port. The electrical filter structure also includes a first matching arrangement electrically coupled between the first filter port and the filter core structure and a second matching arrangement electrically coupled between the second filter port and the filter core structure. | 09-26-2013 |
20130249651 | DIELECTRIC RESONATOR FILTERS, METHODS OF MANUFACTURING THE SAME AND DIPLEXER/MULTIPLEXERS USING DIELECTRIC RESONATOR FILTERS - A dielectric resonator filter and a method of manufacturing the same are disclosed. The dielectric resonator includes a metal housing having a top surface and a bottom surface and defining a resonator cavity, and a dielectric rod located within the resonator cavity. The dielectric rod is short-circuited at both the top surface and the bottom surface. A plurality of holes are formed in the dielectric rod parallel to an axis of the dielectric rod and a plurality of apertures are formed on the top surface corresponding to the positions of the holes, respectively. A plurality of screws are inserted into the holes through the apertures, respectively. The dielectric resonator supports dual TM | 09-26-2013 |
20130293320 | DIELECTRIC CERAMIC AND DIELECTRIC FILTER HAVING THE SAME - There are provided a dielectric ceramic having a high Qf value in a relative permittivity ∈r range of 35 to 45, and a small absolute value of a temperature coefficient τf which indicates change of the resonant frequency in a wide temperature range from a low temperature range to a high temperature range, and a dielectric filter having the dielectric ceramic. A dielectric ceramic includes: a main component, molar ratios α, β, and γ satisfying expressions of 0.240≦α≦0.470, 0.040≦β≦0.200, 0.400≦γ≦0.650, and α+β+γ=1 when a composition formula of the main component is represented as αZrO | 11-07-2013 |
20130328644 | IN-LINE PSEUDOELLIPTIC TE01(n delta) MODE DIELECTRIC RESONATOR FILTERS - The present invention uses TE | 12-12-2013 |
20140022031 | METHOD OF APPLYING PATTERNED METALLIZATION TO BLOCK FILTER RESONATORS - An embodiment of the present invention provides a method of applying patterned metallization to a ceramic block comprising applying a photodefinable ink to said ceramic block; drying said ink; exposing said photodefinable ink to UV radiation through a predefined mask according to the thickness of the film to form a pattern; developing said pattern in a developer solution thereby forming a patterned ceramic block; and rinsing, drying and firing said patterned ceramic block. | 01-23-2014 |
20140028415 | FREQUENCY-TUNABLE BAND-PASS FILTER FOR MICROWAVE - A band-pass filter for microwave is provided that can be frequency-tuned the filter comprising an input resonator comprising a metal input cavity and an input dielectric element, an output resonator comprising a metal output cavity and an output dielectric element, an input excitation means (S | 01-30-2014 |
20140091882 | INCREASING THE MINIMUM REJECTION BANDWITH OF A YIG-TUNED NOTCH FILTER USING A SHUNT YIG RESONATOR - A Yttrium Iron Garnet (YIG) tuned band reject filter using one or more Shunt YIG resonators provides for much wider minimum rejection bandwidths without increasing maximum 3 db bandwidths or spurious response. Various configurations of a tunable shunt YIG tuned band reject filter achieves a wide rejection bandwidth at the low end of the tuning range while keeping the maximum 3 db bandwidth, normally occurring at the high end of the tuning range, to a minimum. | 04-03-2014 |
20140091883 | MULTI-MODE RESONANT FILTER - Various multi-mode resonant filters including a housing having a cavity, are provided. The multi-mode resonant filters include a Dielectric Resonant (DR) element received in the cavity of the housing, and a plurality of transmission lines for connecting a point on one of a first axis, a second axis, and a third axis with a point on another axis. The first axis, the second axis, and the third axis are orthogonal to each other with respect to a center of the DR element. | 04-03-2014 |
20140104015 | Spherical Filter - An embodiment filter including metallic plating unitarily forming a spherical shell and a resonator, the resonator defining a resonator cavity, a tuning nut disposed in a lower portion of the resonator cavity, and a tuning screw threadably secured within the resonator cavity by the tuning nut, the tuning screw rotatable to deform an upper portion of the resonator to tune the filter. | 04-17-2014 |
20140104016 | Bracket for RF Monoblock Filter and Filter-PCB Assembly Incorporating the Same - A combination RF filter and printed circuit board assembly wherein the RF filter is defined by a block of dielectric material including at least first and second side surfaces. A metal bracket with a plurality of fingers is secured to each of the first and second side surfaces. The fingers on the brackets extend through respective apertures in the printed circuit board and are soldered to the printed circuit board. The brackets relieve and transfer the thermal and mechanical stresses that result from use of a filter and printed circuit board that are made of materials with different thermal and mechanical characteristics and reduce the risk of cracking or damage to the filter, the printed circuit board, and the solder joints during use. | 04-17-2014 |
20140111289 | Microwave Filter Having an Adjustable Bandwidth - A microwave filter includes a first adjustable coupling resonator connected via a first coupling screen to an input of the microwave filter, a frequency resonator configured to establish a transmission frequency of the microwave filter and connected to the first adjustable coupling resonator via a second coupling screen, and a second adjustable coupling resonator connected to the frequency resonator via a third coupling screen. | 04-24-2014 |
20140118095 | MULTI-MODE FILTER - The present invention provides a multi-mode cavity filter in which signals are coupled to or from a resonator body, using a coupling path with first and second portions arranged such that current flows in opposite directions and the couplings due to the magnetic fields generated partially cancel one another. In this way, the degree of coupling to any particular mode of the filter can be closely controlled by varying the length and/or orientation of the portions with respect to each other. | 05-01-2014 |
20140132369 | SYSTEM AND METHOD FOR REDUCING EFFECTS OF SWITCHED CAPACITOR KICKBACK NOISE - A circuit includes a first input terminal, a first transmission line, a first sampling switch coupled to the first input terminal through the first transmission line, a first sampling capacitor coupled to the sampling switch, and a first open-circuit quarter wavelength stub coupled to the first transmission line, the first open-circuit quarter wavelength stub configured to reduce kickback noise on the first transmission line. A method for reducing kickback noise in a circuit includes determining a frequency associated with a kickback noise on a first transmission line of the circuit, the circuit having an input terminal coupled to the first transmission line, configuring a length of an open-circuit quarter wavelength stub to correspond to the determined frequency, and coupling the open-circuit quarter wavelength stub to the first transmission line to filter the frequency associated with the kickback noise. | 05-15-2014 |
20140132370 | FREQUENCY-TUNABLE FILTER WITH DIELECTRIC RESONATOR - A frequency-tunable microwave-frequency wave filter with dielectric resonator, comprises a metallic cavity and at least one stack along a rotation axis, the resonator-forming stack being disposed inside the cavity and comprising at least a first and a second element each made of dielectric material, the second element being mobile in rotation with respect to the first element around the rotation axis and exhibiting a first position and at least one second position separated by an angle of rotation, and the elements exhibiting shapes such that the overall geometry of the stack is different in the at least two positions, the stack forming a first resonator adapted so that the filter exhibits a first central frequency when the second element is in the first position, and forming a second resonator adapted so that the filter exhibits a second central frequency when the second element is in the second position. | 05-15-2014 |
20140132371 | NOISE SUPPRESSION DEVICE AND MULTILAYER PRINTED CIRCUIT BOARD CARRYING SAME - A noise suppression device includes a resonator unit having a plurality of basic resonators each of which is comprised of a resonance pattern with a prescribed resonance length, and a short-circuit pattern for connecting one end of said resonance pattern to a linear pattern, said resonator unit including a basic resonator having a resonance pattern provided on either an upper position and/or lower position relative to the linear pattern and another basic resonator having another resonance pattern provided on either a left position and/or right position relative to the linear pattern. | 05-15-2014 |
20140152403 | RADIO FREQUENCY FILTER EMPLOYING NOTCH STRUCTURE - The present invention relates to a radio frequency filter employing a notch structure, wherein the notch structure is a dual notch structure which comprises: a C notch structure formed in a predetermined region at a partition between two cavities to be cross-coupled; and an L notch structure formed together with the C notch structure in a predetermined region at a partition between two cavities. | 06-05-2014 |
20140197906 | COMMON MODE FILTER - A common mode filter includes a plurality of substrates stacked along an axial direction, a first conductor structure and a second conductor structure disposed on the substrates and including a plurality of first rings and second rings disposed sequentially along the axial direction. The first rings and the second rings are disposed to alternate with each other along the axial direction. The first conductor structure and the second conductor structure are spaced apart by a first clearance in a first direction transverse to the axial direction. | 07-17-2014 |
20140218134 | Conductor Arrangement with a Dielectric Standing Wave Trap - A conductor arrangement includes a conductor that extends along a conductor axis. The conductor arrangement also includes a standing wave trap to which the conductor is coupled in order to damp standing waves that are excited by an RF field from outside the conductor arrangement. The standing wave trap is in the form of a dielectric resonator device. | 08-07-2014 |
20140232487 | MULTI-MODE RESONATOR, MULTI-MODE FILTER, AND WIRELESS COMMUNICATION DEVICE - Provided is a multi-mode resonator in which four resonance modes are degenerated, a dielectric member is not necessarily required, and enhanced efficient use of space is obtained. A multi-mode resonator | 08-21-2014 |
20140247098 | RADIO FREQUENCY FILTER - A Radio Frequency (RF) filter configured by combining a hybrid coupler with a general filter, for having different characteristics from original characteristics of a general filter is provided, in which a coupler receives an input signal through a first port, divides the input signal, outputs the divided signals through second and third ports, combines signals received through the second and third ports according to phases of the signals, and outputs the combined signal through the first port or as an output signal of the RF filter through a fourth port, and a first filter unit has a first port connected to the second port of the coupler and a second port connected to the third port of the coupler, for having a predetermined frequency filtering characteristic. | 09-04-2014 |
20140253261 | INCREASING THE MINIMUM REJECTION BANDWIDTH OF A YIG-TUNED NOTCH FILTER USING A SHUNT YIG RESONATOR - A Yttrium Iron Garnet (YIG) tuned band reject filter using one or more Shunt YIG resonators provides for much wider minimum rejection bandwidths without increasing maximum 3 db bandwidths or spurious response. Various configurations of a tunable shunt YIG tuned band reject filter achieves a wide rejection bandwidth at the low end of the tuning range while keeping the maximum 3 db bandwidth, normally occurring at the high end of the tuning range, to a minimum. | 09-11-2014 |
20140266512 | CMOS BAND-PASS FILTER - A band-pass filter is provided that is configured to output a signal with a frequency within a desired frequency range and to attenuate signals with frequencies outside the desired frequency range. The band-pass filter comprises a CMOS resonator that comprises a resonator cavity and a reflector. The band-pass filter also comprises an impedance convertor that is configured to inhibit at least some insertion losses on the band-pass filter. The band-pass filter also comprises a variable capacitor that is connected between the CMOS resonator and the impedance convertor. The desired frequency range of the band-pass filter can be tuned by adjusting the capacitance of the variable capacitor. | 09-18-2014 |
20140320237 | RADIOFREQUENCY FILTER WITH DIELECTRIC ELEMENT - A radiofrequency filter exhibiting at least one resonant mode comprises: at least one cavity at least partially closed using conductive walls, having a cylindrical outer surface defined by a directing curve described by a generatrix and having a point of symmetry, an axis passing through a point of symmetry and parallel to the generatrix being a longitudinal axis of the cavity. At least one dielectric element is arranged in the cavity and comprises: a first portion having a thickness according to the longitudinal axis and a section according to a plane perpendicular to the longitudinal axis whose vertices are distributed according to a polygon, at least two vertices being short-circuited between them by the conductive walls of the cavity, via an electrical or radiofrequency contact between the vertices and walls, at least one pyramidal portion comprising an apex and a base coinciding with an extreme section of the first portion. | 10-30-2014 |
20140320238 | COUPLED LINE SYSTEM WITH CONTROLLABLE TRANSMISSION BEHAVIOUR - The invention relates two lines each with two terminals. A first line provides a first terminal and a second terminal. A second line provides a first terminal and a second terminal. The lines extend in spatial proximity and are coupled. The two lines transport an electromagnetic signal fed into the line system. Distanced from the first terminal of the second line and distanced from the second terminal of the second line, at least one controllable element is arranged along the second line. The invention further relates to a switch, a controllable diplexer, a controllable frequency filter, a controllable attenuator and a controllable phase shifter. | 10-30-2014 |
20140320239 | MULTI-MODE BANDPASS FILTER - The present invention can couple multiple resonances through a change in the shape of a part of a dielectric resonance element or of a cavity so as to couple energy between resonances when generating the multiple resonances, such as dual or triple resonances, of the dielectric resonance element in one cavity, thereby simplifying the shape and reducing the size thereof. In addition, a dielectric resonance element is manufactured into the shape of a doughnut so as to generate triple resonances in one cavity, thereby facilitating the manufacture of the dielectric resonance element and the emission of heat from the dielectric resonance element. | 10-30-2014 |
20140340174 | ACTIVE FILTER WITH DUAL RESPONSE - Based on an active low-pass filter structure comprising a main conductor line between an input port and an output port, consisting of an input conductor section, an output conductor section, and an inductance network in series between the input and output sections, the inductance network being coupled to the LC resonators, an LC resonator connected to each junction point between two network inductances, and at least one negative resistance in series with one of the resonators, a dual response filter is formed by providing an auxiliary conductor line, wherein an input end of the filter is connected to an electrical ground, forming a resonator with its own resonant frequency less than the cut-off frequency f | 11-20-2014 |
20140347147 | COAXIAL FILTER WITH ELONGATED RESONATOR - A microwave filter has a housing defining an inner cavity. A first resonator is positioned in a first portion of the inner cavity. A second resonator is positioned in a second portion of the inner cavity. A third resonator is positioned in a third portion of the inner cavity. The first resonator and the third resonator are cross-coupled via an iris. The second resonator is elongated and is coupled to the first resonator and the third resonator. The resulting microwave filter has a frequency response having a transmission zero in the lower stopband. A high-pass filter is realized without the use of a cross-coupling probe. | 11-27-2014 |
20140361852 | TUNABLE RF FILTER PATHS FOR TUNABLE RF FILTER STRUCTURES - This disclosure relates generally to radio frequency (RF) filter structures. In one embodiment, an RF filter structure includes a first resonator and a second resonator. The second resonator is operably associated with the first resonator such that an energy transfer factor between the first resonator and the second resonator is less than 10%. The first resonator includes a first inductor and a first capacitive structure electrically connected to the first inductor, while the second resonator has a second inductor and a second capacitive structure electrically connected to the second inductor. A displacement between the first inductor and the second inductor is less than or equal to half a maximum lateral width of the second inductor. To set an electric coupling coefficient, a first cross-coupling capacitive structure is electrically connected between the first resonator and the second resonator. | 12-11-2014 |
20150035622 | INTERFERENCE REJECTION RF FILTERS - RF communications circuitry includes an RF filter structure, which includes a group of resonators, a group of cross-coupling capacitive structures, and a group of egress/ingress capacitive structures, is disclosed. Each of the group of cross-coupling capacitive structures is coupled between two of the group of resonators. A first portion of the group of egress/ingress capacitive structures is coupled between a first connection node and the group of resonators. A second portion of the group of egress/ingress capacitive structures is coupled between a second connection node and the group of resonators. | 02-05-2015 |
20150061792 | VARIABLE BANDWIDTH RF FILTER - Disclosed is a variable bandwidth RF filter. The disclosed filter comprises: a first filter unit having a first bandwidth and a variable-frequency structure; and a second filter unit having a second bandwidth and a variable-frequency structure. The first filter unit and the second filter unit are coupled to a cascade structure, and the bandwidth is adjusted by varying the frequency of the first filter unit and of the second filter unit. The disclosed filter is advantageous in that the variation of the bandwidth can be easily performed using a simple structure. | 03-05-2015 |
20150061793 | Filtering Apparatus - A filtering apparatus includes a passband of a first-level unit which is formed by at least three coaxial filters covers a passband of a second-level unit which is formed by at least three dielectric filters, and a bandwidth of the first-level unit is twice the bandwidth of the second-level unit, so that when the coaxial filters are coupled to the dielectric filters, insertion loss of the coaxial filters is reduced, thereby reducing overall insertion loss of the filtering apparatus. By making a transmission zero of the first-level unit be located at a second harmonic frequency point of the second-level unit, the filtering apparatus can have high suppression on a second harmonic, thereby obtaining relatively desirable far-end suppression performance. | 03-05-2015 |
20150097639 | HARMONIC OSCILLATOR AND PREPARATION METHOD THEREOF, FILTERING DEVICE AND ELECTROMAGNETIC WAVE DEVICE - The disclosure relates to a harmonic oscillator and a preparation method thereof, a filtering device and an electromagnetic wave device. The harmonic oscillator includes at least one dielectric slab and response units attached on one surface of the at least one dielectric slab, where the response units are structures manufactured by conductive material and provided with geometric patterns. According to the technical solution of the disclosure, the filtering device and the electromagnetic wave device with the harmonic oscillator are good in structure stability. Swinging of a harmonic oscillator sheet layer is low in loss. The Q value of the harmonic oscillator prepared by the disclosure is high; and loss of a resonant cavity, the filtering device and a microwave device with the harmonic oscillator is obviously reduced. | 04-09-2015 |
20150116057 | WIDEBAND ELECTRONICALLY TUNABLE CAVITY FILTERS - An apparatus to filter electromagnetic waves includes a cavity and one or more tuning circuits. The cavity is configured to receive the electromagnetic waves and has a resonant frequency. The one or more tuning circuits are disposed proximate to or in the cavity. The one or more tuning circuits and the cavity are configured to filter the electromagnetic waves and the resonant frequency of the cavity is based on the one or more tuning circuits. | 04-30-2015 |
20150116058 | RADIO FREQUENCY (RF) CAVITY FILTER INCLUDING TUNING BOLT HOLDING MEMBER AND SAID TUNING BOLT HOLDING MEMBER - Provided is a radio frequency (RF) cavity filter including a tuning bolt holding member, the RF cavity filter including a top block, a bottom block to form a cavity along with the top block, a resonator disposed in the cavity, a tuning bolt to penetrate through the top block, and a tuning bolt holding member disposed to be in contact with one end of the tuning bolt to hold the tuning bolt, which may fix a position of the tuning bolt. | 04-30-2015 |
20150123747 | Dielectric Filled Cavity Resonator for 30 GHz IMUX Applications - A dielectric filter includes a receiving member with a plurality of receiving spaces and a cover. The cover is arranged to cover the receiving spaces in the receiving member. Each receiving space of the plurality of receiving spaces includes a rectangular cavity with a dielectric. | 05-07-2015 |
20150318592 | TEM Mode Dielectric Filter and Manufacturing Method Thereof - A transverse electromagnetic (TEM) mode dielectric filter and a manufacturing method thereof are provided. The mode dielectric filter provided by the present invention includes a dielectric body and a silver plating layer, where the silver plating layer covers a surface of the dielectric body, and a dielectric constant of the dielectric body is less than or equal to 21. The TEM dielectric filter provided by the present invention has a large energy storage space in a single resonant cavity of a dielectric material, and has a high quality factor. An insertion loss of the TEM dielectric filter is low, and electrical conductivity of the silver plating layer is high. | 11-05-2015 |
20150325898 | RESONANCE DEVICE AND FILTER INCLUDING THE SAME - A resonance device including a plurality of signal input/output ports, further including: a plurality of resonators arranged in a state of being spaced apart from each other; and a notch resonator formed at a side of the plurality of resonators, wherein the notch resonator includes: a laminated part having a laminated structure formed by layering a plurality of conductive layers; a first transmitting layer connected to one of the plurality of conductive layers; and a bridge connected between the first transmitting layer and one of the plurality of resonators, wherein one of the plurality of signal input/output ports is connected to the bridge. | 11-12-2015 |
20150325899 | RESONANCE DEVICE AND FILTER INCLUDING THE SAME - A resonance device including a plurality of resonators arranged in a state of being spaced apart from each other; and a notch resonator formed above the plurality of resonators, wherein the notch resonator includes: a transverse layer having an area overlapping with at least three resonators of the plurality of resonators; and a plurality of short-ended layers connecting the transverse layer to a first ground surface. | 11-12-2015 |
20150325902 | TM DIELECTRIC RESONATOR, METHOD FOR IMPLEMENTING TM DIELECTRIC RESONATOR AND TM DIELECTRIC FILTER - A method for implementing a TM dielectric resonator is provided, which includes: a dielectric resonant column component with a metal connecting plate is machined; a metal cavity with an opening at one end is machined; the metal connection plate of the dielectric resonant column component is fastened to the inner wall of the metal cavity by a screw; the opening of the metal cavity is covered with a prefabricated cover plate; and a prefabricated tuning screw is screwed from the cover plate into the metal cavity. | 11-12-2015 |
20150380799 | Multi-Mode Filter Having Aperture Arrangement with Coupling Segments - A multi-mode filter including a resonator body including a piece of dielectric material, the resonator body being configured to support a first resonant mode and a second resonant mode, the resonator body having a covering of an electrically conductive material, wherein the covering is provided with a coupling aperture arrangement, the coupling aperture arrangement including a first coupling segment and a second coupling segment, wherein the first coupling segment is configured to couple a first magnetic field or a first electric field to the first resonant mode or the second resonant mode within the resonator body and the second coupling segment is configured to couple a second magnetic field or a second electric field to the first resonant mode or the second resonant mode within the resonator body. | 12-31-2015 |
20150380800 | Multi-Mode Cavity Filter - A multi-mode cavity filter, including first and second dielectric resonator bodies, each incorporating a piece of dielectric material, a first piece shaped to support a first resonant mode and a second resonant mode that is substantially degenerate with the first mode, and the second piece shaped to support a third resonant mode and a fourth resonant mode that is substantially degenerate with the third mode, a layer of electrically conductive material in contact with and covering a surface of the first and a surface of the second dielectric resonator bodies, an aperture in the layer, wherein the aperture includes first and second portions, wherein the first portion transfers signals from the first or second resonant mode to the third or fourth resonant mode and the second portion transfers signals from the first or second resonant mode to the third or fourth resonant mode in parallel. | 12-31-2015 |
20160006105 | Multi-Mode Cavity Filter and Excitation Device Therefor - A multi-mode cavity filter, including at least one dielectric resonator body incorporating a piece of dielectric material having a shape to support first resonant mode and a second substantially degenerate resonant mode; excitation device(s) for at least one of: establishing an electromagnetic field external to, but immediately adjacent to, face of the dielectric resonator body or for extracting energy from an electromagnetic field located external to, but immediately adjacent to, a face of the dielectric resonator body, a layer of conductive material in contact with and covering the dielectric resonator body on the face of the dielectric resonator body: at least one aperture in the layer of conductive material for inputting signals to the dielectric resonator body and/or outputting signals from the dielectric resonator body, wherein the excitation device is located, in at least two dimensions, at an electrical centre of the face of the dielectric resonator body. | 01-07-2016 |
20160006106 | Filter - A cavity filter, including first and second dielectric resonator bodies, each incorporating a piece of dielectric material, each piece of dielectric material shaped to support at least a first resonant mode, at least one excitation device for establishing an electromagnetic field within at least a first dielectric resonator body or extracting energy from an electromagnetic field located within the first dielectric resonator body, a layer of electrically conductive material in contact with and covering a surface of the first and a surface of the second dielectric resonator bodies, an aperture in the layer of electrically conductive material for inputting signals to the second dielectric resonator body and/or outputting signals from the second dielectric resonator body wherein the at least one excitation device is arranged to directly excite the first resonant mode or directly extract energy from the first resonant mode in the second dielectric resonator via the aperture. | 01-07-2016 |
20160049710 | THREE DIMENSIONAL TUNABLE FILTERS WITH AN ABSOLUTE CONSTANT BANDWIDTH AND METHOD - A tunable bandpass filter to provide a constant absolute bandwidth across the entire tuning range. The filter comprises of a plurality of tunable resonators, each having an enclosure. A resonating structure extending upwardly from the bottom surface of the enclosure and a tuning screw with a flat head extending downwardly from the top surface of the enclosure, wherein the resonating structure and the flat head of the screw face each other and form a gap. The height of the tuning screw can be adjusted to change the gap between the resonating structure and the flat head. The adjustable gap of the present filter allows for tunable filter operation. | 02-18-2016 |
20160049717 | DIELECTRIC RESONATOR AND DIELECTRIC FILTER - A dielectric resonator and a dielectric filter are provided. The inner wall or the outer wall of the dielectric resonator is plated with silver. With the technical solution, it can be guaranteed that the volume of a dielectric resonant column of which the inner wall or the outer wall is plated with silver is reduced by about 35% as compared with the volume of an ordinary dielectric filter, or the volume of the dielectric resonator is reduced under the condition of the same cavity body. In addition, the dielectric resonator is stable and reliable in filtering performance, simple in production process, and overcomes the defect of large size of the universal dielectric resonator in related art in the low communication frequency band. | 02-18-2016 |
20160072169 | Cavity Resonator Filters With Pedestal-Based Dielectric Resonators - In one embodiment, a filter includes two sets of dielectric resonators mounted in corresponding sets of metallic resonant cavities. Adjoining resonant cavities are separated by a wall that have an opening. Each dielectric resonator of the first and second sets has a post and a single connected pedestal and is mounted within its corresponding cavity so that the post contacts a first cavity wall and the pedestal is separated from the opposing wall by an air gap. Each dielectric resonator of the first set is oriented in a first direction, with its pedestal on the bottom. Each dielectric resonator of the second set is oriented in a second direction, opposite to the first, with its pedestal on the top. The filter's (i) source port couples with a resonator of the first set and (ii) load port couples with a resonator of the second set. | 03-10-2016 |
20160081211 | Shell of Electronic Device and Wave Filter - The present invention relates to a shell and a wave filter of an electronic device. The shell comprises a base, two sidewalls, and a plurality of terminals. The base comprises an upper lateral and a lower lateral, the upper lateral and the lower lateral are opposite to each other. The sidewalls are disposed at the upper lateral and located separately at the opposite sides of the base, the sidewalls are opposite to each other, the side of the sidewall that faces away the base has a surface. The terminals are symmetrically arranged in order at the other opposite sides of the base, the terminals are embedded in the base, each terminal includes an upper section and an lower section, the upper section vertically extends upwards from the upper lateral, the lower section horizontally extends outwards from the lower lateral, at least a portion of the lower section is affixed flatly to the lower lateral. | 03-17-2016 |
20160111769 | ARRAY APPARATUS, CIRCUIT MATERIAL, AND ASSEMBLY HAVING THE SAME - An array apparatus includes a plurality of spaced apart dielectric resonators, and a plurality of spaced apart signal lines disposed in one-to-one relationship with respective ones of the plurality of resonators. Each one of the respective ones of the plurality of signal lines is disposed in off-axis electrical signal communication with a first portion of the respective ones of the plurality of resonators. | 04-21-2016 |
20160118951 | HIGH FREQUENCY FILTER AND HIGH FREQUENCY MODULE EQUIPPED WITH SAME - To provide a smaller-sized high frequency filter. In a high frequency filter according to an embodiment of the invention, two filter circuits each equipped with a first externally coupling capacitor having one end coupled to an input-output terminal, a wavelength shortening capacitor having one end coupled to other end of the externally coupling capacitor and having other end coupled to the ground potential, and a resonator having one end coupled to the other end of the externally coupling capacitor and the one end of the wavelength shortening capacitor, having other end coupled to the ground potential, and being formed of a distributed constant line. The two filter circuits are broadside-coupled to each other. | 04-28-2016 |
20160126606 | Transmission Line Reflectionless Filters - Reflectionless transmission line filters, as well as a method for designing such filters is disclosed. These filters preferably function by absorbing the stop-band portion of the spectrum rather than reflecting it back to the source, which has significant advantages in many different applications. The insertion of additional transmission line sections that change the phase response of the circuit without altering the amplitude response preferably allows follow-up transmission line identities to be applied in order to arrive at a more easily manufacturable filter topology. This facilitates their application over a higher frequency range the solely lumped-element circuits. | 05-05-2016 |
20160126613 | HYBRID CAVITY AND LUMPED FILTER ARCHITECTURE - A resonator includes an inductive element and a conductive cavity surrounding the inductive element. In particular, the conductive cavity surrounds the inductive element such that a capacitance is distributed between the inductive element and the conductive cavity. By distributing a capacitance between the inductive element and the conductive cavity, a high quality-factor resonator can be achieved by the resonator with a relatively small form factor. | 05-05-2016 |
20160172733 | Multi-Mode Filter | 06-16-2016 |
20160181677 | RADIO FREQUENCY FILTER ASSEMBLY | 06-23-2016 |