| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 333203000 | Digital structure | 45 |
| 20080211603 | Filter Coupled by Conductive Plates Having Curved Surface - Provided is a resonator filter using conductive plates having a curved surface to connect an input/output coaxial connector to a resonator. The resonator filter includes: a plurality of resonators for resonating; an input/output coaxial connector; an input/output supporting unit formed between the input coaxial connector and one of the resonators and/or between an output supporting unit formed between the output coaxial connector and other resonator for electrically and mechanically supporting the input/output coupling; and a connecting unit for connecting the input/output supporting unit and the input/output coaxial connector, wherein the input/output supporting unit is a conductive plate with a curved surface having a center axis similar to the resonators. | 09-04-2008 |
| 20080309434 | Ceramic monoblock filter with metallization pattern providing increased power load handling - A ceramic monoblock filter incorporating a top face input/output port metallization pattern defining an input/output transmission line, a power load distribution bar, and a ground plate. The transmission line, power load distribution bar, and ground plate are all positioned and oriented relative to each other and two of the resonators defining the filter to define load splitting capacitors providing increased power load handling characteristics. | 12-18-2008 |
| 20090002100 | SYSTEM AND METHOD FOR TUNING MULTICAVITY FILTERS - The invention refers to a system and method to tune a multicavity filter of microwave signals, said filter comprising a filter body (CF), a removable lid (CO), n resonant cavities dug out in said filter body (CF) and n tuners (TU) susceptible of displacement under the action of movement means. Typically a sub-system to absorb the oscillations and vibrations generated in such displacements is associated to each tuner. | 01-01-2009 |
| 20090108962 | Dielectric Filter for Base Station Communication Equipment - In a dielectric filter ( | 04-30-2009 |
| 20090153271 | VARIABLE RADIO FREQUENCY BAND FILTER - A variable radio frequency band filter capable of varying the resonance frequency band comprises a housing having a support; a number of resonator rods arranged along the longitudinal direction of the housing; at least one tuning rod positioned on top of the resonator rods; a tuning support extending through the respective tuning rods along the longitudinal direction of the housing and adapted to slide on top of the respective resonator rods to vary the position of the tuning rods; and a frequency variation unit positioned on a lateral surface of the housing. The frequency variation unit being coupled to an end of the tuning support and adapted to vary the position of the tuning rods, as the tuning support is slid, according to the frequency band. | 06-18-2009 |
| 20090195334 | HIGH FREQUENCY MODULE PROVIDED WITH POWER AMPLIFIER - The present invention is provided with a high frequency module comprising a multilayered substrate, a power amplifier IC mounted on the upper surface of the multilayered substrate, first and second filters disposed substantially directly below the power amplifier IC in an inner layer of the multilayered substrate, and coupling-reducing ground vias disposed between the first filter and the second filter. At least the first filter is disposed substantially directly below the power amplifier IC. The coupling-reducing ground vias double as thermal vias for dissipating heat generated by the power amplifier IC. | 08-06-2009 |
| 20090256652 | SUSPENDED TM MODE DIELECTRIC COMBLINE CAVITY FILTER - A combline filter has a ceramic resonator disposed inside at least one cavity wall. Because the resonator is implemented as a hollow rod, a tuning element may be inserted into an opening on the top of the rod to tune its frequency. A mounting element, inserted into an opening on the bottom of the rod secures its position inside a cavity resonator. Instead of soldering the resonator to the filter's walls, the resonator is supported above a bottom or side wall of the cavity resonator. | 10-15-2009 |
| 20090302974 | LIGHT-WEIGHT LOW-THERMAL-EXPANSION POLYMER FOAM FOR RADIOFREQUENCY FILTERING APPLICATIONS - An apparatus | 12-10-2009 |
| 20100141356 | COUPLED LINE FILTER AND ARRAYING METHOD THEREOF - A coupled line filter includes: a first line resonator connected input port and a second line resonator connected with output port each having an electrical length of 270° at a predetermined center frequency, the first and second line resonators being disposed parallel to each other; and a third line resonator including one or more line resonators disposed between the first line resonator and the second line resonator, each line resonator having an electrical length of 90° at the center frequency and a first side aligned with first sides of the first line resonator and the second line resonator, wherein an order of the coupled line filter is determined by summing the number of the line resonators included in the third line resonator and the first and second line resonators. | 06-10-2010 |
| 20100188174 | COMPACT TUNABLE DUAL BAND STOP FILTER - Various exemplary embodiments include a technique for tuning a filter to have two stop bands. This technique may involve combination of signals from a plurality of high-band notch resonators and low-band notch resonators. Loop wires may couple both high-band and low-band notch resonators to a central conductor, thereby enabling the central conductor to transmit a signal having dual stop bands. | 07-29-2010 |
| 20100271153 | FIXATION ARRANGEMENT FOR RESONATOR OF CAVITY FILTER - A fixation arrangement for a resonator of a cavity body includes a cavity body including a base, a resonator defining a cavity and comprising a bottom, a screw including sharply arc-shaped head and securing the resonator on the base of the cavity body, and a sticky element located between the screw head of the screw and the bottom of the resonator. | 10-28-2010 |
| 20100277258 | TUNABLE CAPACITIVE INPUT COUPLING - Various exemplary embodiments include a cavity having a tuning assembly with tunable capacitive coupling. The tuning assembly may have a recess having a specified depth, designed for a default magnitude of coupling into the cavity. A sleeve may be fully inserted within the recess to have the structure operate at that default coupling magnitude. If a different amount of coupling is desired, the sleeve may be inserted to a particular depth that only includes part of the recess, enabling repeatable tuning of a plurality of cavities. | 11-04-2010 |
| 20110025433 | INLINE CROSS-COUPLED COAXIAL CAVITY FILTER - An inline microwave bandpass filter where cross coupling between non-adjacent resonators is realized by changing the orientation of selected resonators. The microwave bandpass filter includes a cavity and three or more resonators arranged in a row (or inline) in the cavity. At least one resonator has a different spatial orientation from at least one other resonator. For example, one or more of the resonators may be rotated 90 or 180 degrees with respect to one of the other resonators. This arrangement of resonators facilitates sequential coupling between pairs of adjacent resonators and cross coupling between at least one pair of non-adjacent resonators without the use of additional cross coupling structures such as dedicated coupling probes or extra cavities. One or more plates may be introduced between adjacent resonators to independently control the sequential and cross coupling. | 02-03-2011 |
| 20110032054 | FREQUENCY TUNEABLE FILTER USING A SLIDING SYSTEM - A frequency-tunable filter using a sliding system is disclosed. The frequency-tunable filter includes: a housing, in which a multiple number of cavities are defined by partitions; a sub-cover, which is coupled to an upper portion of the housing and in which a guide groove is formed; at least one sliding member installed in the guide groove; a main cover coupled to an upper portion of the sub-cover; a resonator held in the cavity; and at least one tuning element coupled to a lower portion of the sliding member to be inserted inside the housing, where tuning is achieved by a sliding movement of the sliding member, and at least one first guide member is coupled to at least one side surface of the sliding member such that the first guide member guides a sliding movement by way of contact with the side surface of the guide groove. | 02-10-2011 |
| 20110102110 | TUNING ELEMENT ASSEMBLY AND METHOD FOR RF COMPONENTS - Various exemplary embodiments relate to a tuning element assembly and method for tuning an a radio frequency (RF) component, where the component has one or more walls defining a cavity, with at least one wall having at least one bore hole. A bushing is mounted in the bore hole in the wall, and a tuning element is slidably mounted and received in the bushing so that the tuning element projects inwardly through the bushing and into the cavity and is axially adjustable. A method of tuning an RF component also includes providing a bushing mounted in a bore in a wall of the RF component, sliding a tuning element that is slidably mounted and received in the bushing so that the tuning element projects inwardly through the bushing and into the cavity by a distance varying according to the sliding of the tuning element, monitoring a performance characteristic of the RF component, and releasing the tuning element so that a desired performance characteristic is achieved. | 05-05-2011 |
| 20110115575 | CAVITY FILTER WITH TUNING STRUCTURE - A cavity filter defines a cavity with an opening on a top portion thereof and includes a lid to cover the opening of the cavity. A plurality of resonators are secured on a bottom portion opposite to the top portion of the cavity. The lid includes a plurality of bases extending from the lid toward the plurality of the resonators, respectively. A plurality of threaded holes penetrating the lid and one of the bases faces to the plurality of resonators, respectively. Each threaded hole includes a stopper portion extending from an inner surface of the threaded hole inward to form a step defining a hole in communication with the threaded hole. Each threaded hole corresponds to a tuning post to adjust a resonating frequency of the cavity filter. | 05-19-2011 |
| 20110115576 | CAVITY FILTER WITH A SLIDER - A cavity filter includes an enclosure, resonators secured inside the enclosure, a lid, a slider, and a driving device. The enclosure includes a bottom portion, sidewalls extending from edges of the bottom portion to define a cavity. Each sidewall defines a positioning portion at a top surface thereof. The lid covers the enclosure. The slider includes tuning cells each partially coated with metal and positioned opposite to one of the resonators. The slider is movably disposed between the lid and the resonators and slides on the positioning portions. The driving device is located inside the enclosure and drives the slider to move along the positioning portions to adjust a resonating frequency of the cavity filter. | 05-19-2011 |
| 20110121917 | MICROWAVE FILTER - A filter filtering microwaves, the filter comprising a cavity and at least one metal comb-line resonator located within the cavity and at least one dielectric member surrounding the at least one metal comb-line resonator. | 05-26-2011 |
| 20110227673 | GROUND STRUCTURES IN RESONATORS FOR PLANAR AND FOLDED DISTRIBUTED ELECTROMAGNETIC WAVE FILTERS - Coupling between non-adjacent resonators and wave propagation through the waveguide structure in distributed EM filters are reduced by forming one or more holes in one or more of the resonators (planar or folded) and by passing a conductive structure through each hole normal to the resonator. The conductive structures (vertical vias or horizontal strips) are preferably grounded, either by direct connection or capacitive coupling to one or more ground planes or by creation of a virtual ground. The holes are spaced apart from the edges of the resonator so as to minimize any interference with the current and fields concentrated at the edges of each resonator. These conductive structures narrow the effective cavity width “a | 09-22-2011 |
| 20110241801 | REDUCED SIZE CAVITY FILTERS FOR PICO BASE STATIONS - An improved microwave cavity filter used in cellular communication systems such as base stations is disclosed. The cavity filter has a conductive housing forming a cavity therein and a hollow conductive resonator configured in the cavity with a folded hat shaped upper portion. A tuning screw extends from the top cover of the housing into the top folded hat portion of the hollow resonator to fine tune the resonator. The resonator also may preferably include two different diameter sections providing a first high impedance section with smaller diameter and a second lower impedance section with a larger diameter configured at an upper end of the resonator. This configuration provides a significantly smaller cavity height for a given power handling capability. The resonator is preferably of constant thickness allowing low cost stamping or other forming techniques to be used in forming the resonator. | 10-06-2011 |
| 20110316650 | BAND STOP FILTER - The present invention relates to a band stop filter comprising: a resonating bar; a housing on the inside of which is formed a receiving space where the resonating bar is positioned, and which is made in a stepped form such that at least one part of an upper-end part is narrower than a lower-end part in terms of the internal width of the receiving space during the formation of the receiving space; a lower cover which has the resonating bar fitted thereto, is joined to the lower part of the housing and, when so joined, is assembled such that the resonating bar is inserted into the receiving space, and which forms the floor surface of the receiving space; and a hermetic-sealing cover which is provided within a recess pre-made in the housing in such a way as to couple with a resonator formed by the receiving space and the resonating bar on the inside of the receiving space, and is designed to hermetically seal the recess in the housing where a transmission line has been provided. | 12-29-2011 |
| 20120062341 | MICRO BAND-PASS FILTER - A micro band-pass filter is disclosed. The micro band-pass filter includes a first resonator having a first inter-digital unit and a second inter-digital unit, which is connected to a first wavelength-impedance converter, on two ends thereof, and a second resonator having a third inter-digital unit and a fourth inter-digital, which is connected to a second wavelength-impedance converter unit on two ends thereof. The second inter-digital unit is adapted to face the third inter-digital unit when forming a first inter-digital coupling structure along with the third inter-digital unit, and the first inter-digital unit is adapted to face the fourth inter-digital unit when forming a second inter-digital coupling structure. | 03-15-2012 |
| 20120092089 | Dielectric Resonator Rod and Method in a Radio Frequency Filter - The invention relates to a dielectric resonator rod in a transverse magnetic mode radio frequency filter comprising a first cylindrical end part ( | 04-19-2012 |
| 20120119850 | ADJUSTABLE RESONATOR FILTER - An adjustable resonator filter comprised of cavity resonators. There is a mov- able conductive tuning element in the filter for adjusting each electromagnetic coupling, which element is located outside the resonator cavities. When the coupling between two resonators is the case, the movement of the tuning element changes the coupling between the signal ground and a fixed coupling element which extends from a resonator cavity to the next cavity, whereupon the strength of the coupling between the resonators changes. When the coupling between a resonator and the input/output line of the filter is the case, by means of the tuning element it is implemented a section with a low impedance inside a range with a relatively high impedance on the transmission path. This section moves together with the tuning element, in which case the strength of the coupling between the resonator and the line changes. | 05-17-2012 |
| 20120119851 | ADAPTABLE RESONATOR FILTER - An adaptable filter made up of cavity resonators. The adaptation takes place by adjusting the connection from the input connector (CN | 05-17-2012 |
| 20120200374 | HIGH-ORDER HARMONIC DEVICE OF CAVITY FILTER - A high-order harmonic device of a cavity filter including a base and a lid cover the base is disclosed. The base has a through groove connecting to an upper and a lower portion. The base has a plurality of output terminal with metallic conductor extending into the inner side formed on the surface of the sidewall. The base has resonance space formed indented to receive the metallic conductor and extending to connect to the through groove. The lid has a plurality of threading holes formed corresponding to chambers and partitions received with adjusting elements for height adjustment. The adjusting elements has the resonance bars corresponding to every chamber and the suppressing bars corresponding to every partition. By adjusting suppressing bar and the partition to a predetermined distance, the space of the channel for transmitting the high-order harmonic wave can be reduced to suppress noise produced by high-order harmonic wave. | 08-09-2012 |
| 20120235770 | CAVITY FILTER THERMAL DISSIPATION - A cavity filter has a resonator. The resonator is engaged by a rod having a mounting portion and a thermal dissipation portion. The mounting portion of the rod extends through the floor of the cavity filter to engage an internal surface of the resonator. The thermal dissipation portion dissipates heat from the resonator to the outside of the cavity filter. | 09-20-2012 |
| 20120235771 | CAVITY FILTER - A cavity filter includes a unitarily formed piece, a cap, a cover, and a tuning adjustment screw. The unitarily formed piece includes a bottom plate portion, a resonator tube body portion formed on a center of the bottom plate portion, and a sidewall portion extending from the bottom plate portion surrounding the resonator tube body portion. The resonator tube body portion defines a resonating cavity therein. The cap is attached onto a distal end of the resonator tube body portion. The cap and the resonator tube body portion cooperatively forms a resonator tube. The cover is attached to the sidewall portion, and the cover includes a screw hole. The cover, the sidewall portion, and the bottom plate portion cooperatively forms a chamber. The tuning adjustment screw is extending through the cover, threadedly engaged in the screw hole and aligned with the resonator tube. | 09-20-2012 |
| 20120262252 | BAND-PASS FILTER - A band-pass filter comprises a first resonator, a second resonator and a third resonator. The second resonator is magnetically coupled to the first resonator. The third resonator is magnetically coupled to the second resonator and is electrically coupled to the first resonator. In addition, the first resonator is a quarter wavelength resonator, the second resonator is a half wavelength resonator, and the third resonator is a quarter wavelength resonator. | 10-18-2012 |
| 20130009728 | ADJUSTABLE RESONATOR FILTER AND METHOD FOR ADJUSTING COUPLING BETWEEN RESONATOR CAVITIES - The invention relates to an adjustable resonator filter, which has a casing made up of a bottom, walls and a lid, which casing functions as a ground for a transmission path, which is divided with conductive partitions into resonator cavities, and on the transmission path of the resonator filter there is a coupling opening in the partitions separating subsequent cavities. In the casing there is by at least one partition a coupling space, which is open into both resonator cavities separated by the partition, which resonator filter has an inductive coupling member. This is arranged to extend through said coupling space into both resonator cavities. The inductive coupling member is in electric contact with the casing at least in one of the resonator cavities. In the coupling space there is a moveable conductive adjustment piece, which has a minimum position for the coupling and a maximum position for the coupling. | 01-10-2013 |
| 20130093539 | METHOD FOR MANUFACTURING AN RF FILTER AND AN RF FILTER - The invention relates to a method for manufacturing an RF filter comprising several resonator cavities and an RF filter manufactured by the method. The resonator cavities are formed into shape from a copper plate in a first manufacturing phase. In a second manufacturing phase the formed resonator cavities are inserted or integrated into a chassis material of the RF filter. | 04-18-2013 |
| 20130181790 | CAVITY FILTER WITH TUNING STRUCTURE - A cavity filter includes a housing having a positioning portion, a cover covering on the housing and defining a pair of first positioning holes, a sliding plate movably supported on the positioning portion and mounted between the positioning portion and the cover to be configured to adjust a resonating frequency of the cavity filter, and a tuning structure fixed on the cover and having a pair of first positioning poles. The sliding plate includes a plurality of elastic arms, each of which is made of insulated material and supported by the positioning portion. Each of the pair of first positioning poles extends through the corresponding first positing hole to touch the corresponding one of the plurality of elastic arms of the sliding plate. | 07-18-2013 |
| 20130222080 | NON-RESONANT NODE FILTER - Various exemplary embodiments relate to a filter configured to operate in an operational frequency range. The filter may include a mainline, at least one combline resonator coupled to the mainline, an input port coupled to the mainline, and an output port coupled to the mainline. The mainline may include at least one non-resonant node. The at least one non-resonant node may be configured to resonate in a frequency range outside of the operational frequency range of the filter, and the at least one combline resonator may be configured to resonate in a frequency range within the operational frequency range of the filter. | 08-29-2013 |
| 20140292445 | CAVITY FILTER WITH CONNECTING STRUCTURE CONNECTED BETWEEN SLIDER AND DRIVING DEVICE - A cavity filter includes a slider, a driving device, and an adapter. The slider is used to slide relative to and couple with a plurality of resonators located in the cavity filter to adjust a resonating frequency of the cavity filter. The driving device is used to drive the slider slide relative to the plurality of resonators and includes a shaft having a free end. The adapter is installed between the slider and the driving device and rotateably connected to the free end of the shaft with a gap configured between the free end and the adapter. | 10-02-2014 |
| 20140292446 | CAVITY FILTER - A cavity filter includes a first layer circuit board, a second layer circuit board and a middle layer circuit board locates between the first layer circuit board and the second layer circuit board. A plurality of resonators locates on the first layer circuit board. A plurality of resonating cavities is located on the second layer circuit board one-to-one corresponding to the resonators. A slot is defined on the middle layer circuit board. The resonators traverse through the slot and are placed in the resonating cavities to form a plurality of resonating units, and the plurality of resonating couple with the slot of the middle layer circuit board. | 10-02-2014 |
| 20140327499 | RADIO FREQUENCY FILTER HAVING CAVITY STRUCTURE - The present invention relates to a radio frequency filter having a cavity structure, comprising: a container which has a hollow inner portion and a cavity that is cut off from the outside, and a resonance element which is placed in the hollow inner portion of the container, wherein the container has a wrinkled structure for adjusting the intervals between a longitudinal front end surface of the resonance element and the inner surfaces of the container facing the longitudinal front end surface using external pressure. Thus, the invention can be further miniaturized and is lightweight, and the design of the invention enables frequency tuning without employing a coupling structure of a tuning screw and a fastening nut, thereby obtaining a convenient and simplified structure. | 11-06-2014 |
| 20140347148 | METHOD OF OPERATION AND CONSTRUCTION OF FILTERS AND MULTIPLEXERS USING MULTI-CONDUCTOR MULTI-DIELECTRIC COMBLINE RESONATORS - This invention provides novel combline resonators with multiple conductors and multiple dielectrics for compact filters and multiplexers with improved electric response. The novel combline resonator consists of multi-conductors being made up for the simplest case of an inner metallic post, an intermediate conductor, and an enclosure. This structure provides two resonant modes that can be used for realizing compact microwave filters and multiplexers. Such filters offer the low cost, compact size and ease of manufacturing features of traditional combline resonator filters, with additional size reduction due to the fact that a single physical cavity provides two electrical resonators. In addition, the new cavity inherently introduces a transmission zero in the guard-bands enhancing the filter selectivity. | 11-27-2014 |
| 20150035623 | VARIABLE HIGH FREQUENCY FILTER DEVICE AND ASSEMBLY - A tunable filter device that changes a central frequency and a bandwidth is provided. The tunable filter device may include a body forming a cavity together with a cover, a resonator attached to or integrally formed on a lower surface of the cavity, a frequency-tuning element including a head and a shaft, the shaft passed through the cover and inserted in the resonator, and a cam disposed on the head to contact the head, wherein an insertion length of the shaft is controlled by the cam. | 02-05-2015 |
| 20150048904 | Resonance Tube, Method for Manufacturing Resonance Tube, and Cavity Filter - A resonance tube, a method for manufacturing a resonance tube, and a cavity filter, which relate to the field of communications devices and can provide a temperature compensation effect of different degrees, reduce a production cost, and improve production efficiency. The resonance tube is manufactured using powder materials, and the powder materials include at least one of carbonyl iron powder and iron powder and at least one of carbonyl nickel powder and nickel powder, a mass percentage of the at least one of carbonyl iron powder and iron powder in the powder materials is 58-70%, and a mass percentage of the at least one of carbonyl nickel powder and nickel powder in the powder materials is 30-42%. The present invention may be used on a communications device, for example, a base station. | 02-19-2015 |
| 20150102873 | CAVITY FILTER, POWER AMPLIFYING MODULE - A cavity filter is disclosed, which comprises a cavity, a cover plate, and a connector inner conductor disposed within the cavity, wherein the connector inner conductor passes through the cover plate to be connected with an external circuit board, the connector inner conductor comprises a first inner conductor and a second inner conductor, the first inner conductor is connected with a signal transmission point on the external circuit board, the second inner conductor is connected with an internal signal transmission point inside the cavity, the first inner conductor and the second inner conductor have a gap therebetween and cooperate with each other to form a structural capacitor, and the internal signal transmission point is connected with the signal transmission point on the external circuit board via the structural capacitor. A power amplifying module and a signal transceiving device are also disclosed. | 04-16-2015 |
| 20150109075 | FILTER - A filter includes a first printed circuit board (PCB), poles mounted on the first PCB, a second PCB located at a top of the first PCB, and caps mounted on the second PCB and covering the poles. Each the cap surrounds the corresponding pole. The cap and the pole cooperatively form a resonator. Each the first PCB and the second PCB is made of light, dielectric material with metallic layers. | 04-23-2015 |
| 20160049711 | Methods And Devices For Connecting A Resonator To A Filter Body - A cavity filter includes a threaded resonator and a threaded filter body to improve the coupling of radio frequency signals. | 02-18-2016 |
| 20160164162 | FILTER PACKAGE - A filter package includes a substrate, a plurality of resonators each coupled to the substrate, and a metal circuit pattern patterned on the substrate, and the plurality of resonators each include a body made of a dielectric material, in which a through hole is formed in one direction, and a conductive film attached to an end surface coupled to the substrate among both end surfaces of the body, and attached to a wall of the through hole. | 06-09-2016 |
| 20160204493 | RADIO FREQUENCY FILTER WITH CAVITY STRUCTURE | 07-14-2016 |
| 20170237142 | Rod-Switched Tunable Filter | 08-17-2017 |
