Entries |
Document | Title | Date |
20090096659 | ELECTROMAGNETIC WAVE ABSORPTION BOARD TO BE USED IN WIRELESS LAN - In a double glazing where a pair of transparent glass sheets are arranged at an interval by having a spacer at the circumferential end portion and where a hollow layer sealed between the pair of glass sheets is formed, there is provided an electromagnetic absorption board used for wireless LAN, which is characterized in that the thickness of the glass sheet is in a range of 2.5-20 mm, that the thickness of the hollow layer is in a range of 2.5-15 mm, that at least one glass sheet of the pair of glass sheets is formed with a resistive film having a surface resistance (surface resistivity) in a range of 20-2K | 04-16-2009 |
20090135042 | ELECTROMAGNETIC WAVE ABSORBER - By using a high electromagnetic wave absorbing loss material and adding it in a small amount to a matrix, an electromagnetic wave absorber useful for GHz band, which can demonstrate the electromagnetic wave absorption capability without ruining characteristics of the matrix, and can enjoy a good formability and a low manufacturing cost, is provided. | 05-28-2009 |
20090135043 | Vehicle Radar Sensor Assembly - A radar electronics module includes a support structure having a first surface having a plurality of recesses with a transmitter circuit board and a receiver circuit board disposed thereon. The transmitter and receiver circuit boards are disposed over the first surface of the supports structure such that transmitter and receive circuits are disposed in cavities on the support structure. The radar electronics module further includes a digital/power supply circuit printed wiring board (PWB) disposed on a second surface of the support structure and a connector disposed on the support structure. The connector is disposed in such a way that it provides electrical connections for at least one of power signals, analog signals or digital signals between at least two of the digital/power supply PWB, the transmitter circuit board and the receiver circuit board. | 05-28-2009 |
20090140906 | GENERIC PICK-UP HORN FOR HIGH POWER THERMAL VACUUM TESTING OF SATELLITE PAYLOADS AT MULTIPLE FREQUENCY BANDS AND AT MULTIPLE POLARIZATIONS - Methods, systems, and apparatus are disclosed for high power thermal vacuum testing of satellite payloads using pick-up horns. Such pick-up horns can include at least one outer metal wall forming a metal body and at least one interior surface disposed in the metal body, forming at least one chamber in the metal body. The pick-up horn further includes a front metal surface disposed at a front end of the metal body, having at least one opening corresponding to the at least one chamber, and at least one high-power absorbing load disposed within the at least one chamber and in contact with the at least one interior surface. A pick-up horn may further include a serpentine coolant path disposed within the metal body between an outer surface of the at least one outer metal wall and the at least one high-power absorbing load. Related systems and methods are described. | 06-04-2009 |
20090146862 | Mobile Sound and Light Resistant Electromagnetic Isolation Chamber - A device enclosing a volume shielded from certain levels of sound, light and electromagnetic radiation, such device that prevents electromagnetic communications and recording devices from transmitting and receiving communications from outside of the devices protected environment while remaining mobile and ungrounded. | 06-11-2009 |
20090284404 | ELECTROMAGNETIC WAVE ABSORBER USING RESISTIVE MATERIAL - An electromagnetic wave absorber includes a ground layer made of a metal conductor, a dielectric layer formed on the ground layer, and a unit cell pattern made of a resistive material, and formed on the dielectric layer. The unit cell pattern includes a fundamental patch having a regular square shape, in which a rectangular recess is formed on the center of each of the respective sides, the fundamental patch being located at the center of each of the unit cell pattern, and half cross dipole patches, which are respectively disposed at the four sides of the fundamental patch at a regular angle so as to be engaged with the recesses formed on the respective sides of the fundamental patch at a regular interval. | 11-19-2009 |
20100001894 | MILLIMETER WAVE FILTERS - An electromagnetic radiation filter uses a plurality of dipole antennas to mitigate the transmission of electromagnetic radiation. The dipole antennas can form one or more arrays that scatter electromagnetic radiation. Examples of application include mitigating the reception of a difference frequency in non-linear radar, use in protective goggles, and use in a protective shield. | 01-07-2010 |
20100045505 | RADIO WAVE ABSORPTION MATERIAL AND RADIO WAVE ABSORBER - A radio wave absorption material is characterized to be obtained by firing a ferrite material that is formed by adding an accessory component, 0.1 to 2 wt % of CoO, to an oxide magnetic material containing main components, 30 to 49.5 mol % of Fe | 02-25-2010 |
20100090879 | MICROWAVE ABSORBER, ESPECIALLY FOR HIGH TEMPERATURE APPLICATIONS - The present invention relates to a microwave absorber, especially for high temperature applications, which comprises at least one resistive sheet and at least one dielectric layer. What especially characterises the invention is that the resistive sheet is made of a MAX phase material. | 04-15-2010 |
20100109932 | TERMINATION OF EDGES OF A PARABOLIC REFLECTOR IN A COMPACT RANGE - Embodiments include an anechoic chamber lined with absorber to absorb electromagnetic energy incident upon the absorber and reflector edge interfaces. The chamber comprises a reflector to reflect waves from a source to form a substantially plane wave field in a test zone within the chamber. In some embodiments, the outer periphery of the reflector extends to the interior walls, floor and ceiling of the chamber. The outer periphery of the reflector is embedded in the absorber in some embodiments. | 05-06-2010 |
20100149018 | ELECTROMAGNETIC WAVE ABSORBER - The disclosed is an electromagnetic wave absorber which is characterized in that ultrathin carbon fibers which show a negative magneto-resistance are contained in the matrix, at a ratio of 0.01-20% by weight based on the total weight. By using a loss material which shows a high electromagnetic waves absorption capability at a small amount, the electromagnetic wave absorber which demonstrates a strong electromagnetic radiation absorption capability without deteriorating the characteristics of the matrix. In addition, this electromagnetic wave absorber has a good formability while being made of a low cost composite material, and is useful as electromagnetic wave absorber for GHz band. | 06-17-2010 |
20100156695 | ELECTROMAGNETIC ABSORBER USING RESISTIVE MATERIAL - An electromagnetic absorber using resistive material includes a ground plane of a conductive material; a dielectric layer formed on the ground plane; and a pattern layer in which specific unit cell patterns made of a resistive material are periodically arranged on the dielectric layer. The electromagnetic absorber is applied to an electronic toll collection system, a transportation device, a building structure, an electronic device and an anechoic chamber. | 06-24-2010 |
20100156696 | RADIO WAVE ABSORBER, ELECTROMAGNETIC FIELD MEASUREMENT SYSTEM AND RADIATED IMMUNITY SYSTEM - A radio wave absorber for use in an electromagnetic field probe that measures an electromagnetic field by means of an antenna section provided therewith, the radio wave absorber including: a first end section; a second end section that is located at a position opposite the first end section; and an intermediate section that is located between the first and second end sections, the intermediate section having outer dimension and thickness that increase in accordance with a distance from the first end section toward the second end section. | 06-24-2010 |
20100231433 | POROUS MATERIALS EMBEDDED WITH NANOPARTICLES, METHODS OF FABRICATION AND USES THEREOF - The present invention relates to porous structures embedded with nanoparticles, methods of forming the structures, and methods of using the structures. In most general form, the invention relates to porous materials embedded with nanoparticles having characteristics, such as magnetic, enabling to align or arrange the nanoparticles in the material by exposure, e.g. to a magnetic field. Therefore, a method according to the invention provides manufacturing materials having variable magnetic and electromagnetic properties which can be adapted during manufacture for various applications, such as electromagnetic wave absorbers, lens, concentrators, etc. | 09-16-2010 |
20100238063 | Magnetic crystal for radio wave absorbing material and radio wave absorbent - Disclosed is a magnetic crystal for electromagnetic wave absorbing materials, having a structure of ε-M | 09-23-2010 |
20100245150 | ARTIFICAL DIELECTRIC COMPOSITES BY A DIRECT-WRITE METHOD - The present invention is generally directed to an artificial dielectric composite having an electrically non-conducting substrate, an electrically non-conducting pattern on the substrate, and an electrically conducting coating on the pattern. The substrate may be a textile such as paper. The electrically non-conducting pattern may comprise palladium. A direct-write device, such as an inkjet printer, may be used to print the pattern onto the substrate. The electrically conducing coating may comprise nickel, gold, palladium, cobalt, iron, copper, or any combination thereof. Also disclosed is the related method of making the artificial dielectric composite. | 09-30-2010 |
20110102231 | INSULATED ULTRAFINE POWDER AND HIGH DIELECTRIC CONSTANT RESIN COMPOSITE MATERIAL - The present invention provides an insulated ultrafine powder containing electrically conductive ultrafine particles coated with an insulation coating, characterized in that the electrically conductive ultrafine particles are formed of a carbon material which is in the form of spherical particles having a diameter of 1 nm or more and 500 nm or less, fibers having a cross-sectional diameter of 1 nm or more and 500 nm or less, or plate-like particles having a thickness of 1 nm or more and 500 nm or less; the insulation coating is formed of an insulating metal oxide or a hydrate thereof; and the thickness of the insulation coating is 0.3 nm or more, and, when the electrically conductive ultrafine particles are in the form of spherical particles, the coating thickness is equal to or less than the diameter of the particles; when the electrically conductive ultrafine particles are in the form of fibers, the coating thickness is equal to or less than the cross-sectional diameter of the fibers; or when the electrically conductive ultrafine particles are in the form of plate-like particles, the coating thickness is equal to or less than the thickness of the plate-like particles; and as well a high-dielectric-constant resin composite material containing the insulated ultrafine powder. The resin composite material exhibits high dielectric constant and radio wave absorbability, while maintaining fundamental characteristics of resin material (i.e., excellent moldability and workability, and light weight). | 05-05-2011 |
20110133977 | INDOOR ELECTROMAGNETIC ENVIRONMENT IMPLEMENTING STRUCTURE AND A CONSTRUCTING METHOD THEREOF - Disclosed is an indoor electromagnetic environment implementing structure. A shield room in a polyhedron structure for blocking electromagnetic waves output from the interior toward the exterior thereof and electromagnetic waves input from the exterior toward the interior when measuring a characteristic of the electromagnetic waves is installed, an electromagnetic wave absorber is installed at a door and a window on a wall through which the electromagnetic waves are output in the shield room, and a cover for covering the electromagnetic wave absorber with a size corresponding to the electromagnetic wave absorber is installed. In this instance, the cover transmits or blocks the electromagnetic waves according to utilization of electromagnetic wave measurement tests. | 06-09-2011 |
20110133978 | MULTI-DIRECTIONAL RESONANT-TYPE ELECTROMAGNETIC WAVE ABSORBER, METHOD FOR ADJUSTING ELECTROMAGNETIC WAVE ABSORPTION PERFORMANCE USING THE SAME AND MANUFACTURING METHOD OF THE SAME - A multi-directional resonant-type electromagnetic wave absorber includes: at least one ground layer; a first dielectric layer and a second dielectric layer respectively formed on different outer surfaces of the ground layer; a first resistive pattern layer formed on an outer surface of the first dielectric layer; and a second resistive pattern layer formed on an outer surface of the second dielectric layer. Herein, the electromagnetic absorption performance is adjusted by changing one or more of thicknesses, permittivities, and permeabilities of the dielectric layers, thicknesses of the resistive pattern layers, and a reflection coefficient of the ground layer. | 06-09-2011 |
20110163903 | Apparatus for Radar Target Cloaking Using Polyhedral Conducting Mesh - An apparatus for interfering with and canceling electromagnetic reflections from a conducting object such as a solid or hollow conducting sphere. The reflection of an incident electromagnetic wave from a conducting sphere can be reduced or cancelled by placing a polyhedral conducting mesh (PCM) around the conducting sphere. The incident EM wave induces electric fields in the region between the conducting mesh and the internal conducting sphere. These induced electric fields may interfere with and in some cases may completely cancel the incident EM wave and thus reduce reflection. The PCM can be tuned to reduce or cancel reflection of incident EM waves at one or more specific frequencies. | 07-07-2011 |
20110163904 | INTEGRATED RADAR-CAMERA SENSOR - An integrated radar-camera sensor is provided which includes a camera sensor component and a radar sensor component both housed within a common single module housing. The sensor module also includes processing circuitry for processing the radar sensor and camera outputs. The sensor module is located behind the windshield of a vehicle and may include glare and/or EMI shields. | 07-07-2011 |
20110227775 | COMBINED ELECTROMAGNETIC WAVE ABSORBER - An electromagnetic wave absorber is provided which has an outstanding electromagnetic wave absorption property with a return loss of 20 dB or greater in a wide frequency band of 30 MHz to 20 GHz. A combined electromagnetic wave absorber includes a magnetic absorber plate, a crossed electromagnetic wave absorber disposed on the magnetic absorber plate, and a compact electromagnetic wave absorber disposed in a space defined by the dielectric loss plates of the crossed electromagnetic wave absorber on the magnetic absorber plate. When viewed in the direction perpendicular to the magnetic absorber plate, the compact electromagnetic wave absorber is configured in a multilayer structure having a plurality of electromagnetic wave absorbent layers with a low dielectric layer interposed therebetween. | 09-22-2011 |
20110260904 | ELECTROMAGNETIC WAVE ABSORBER - An electromagnetic wave absorber includes a dielectric layer, a divided conductive film layer and an electromagnetic wave reflective layer, wherein a ratio of thickness ‘d’ and wavelength ‘λ’ satisfies a condition of [0.01≦d/λ0.03], weight per unit area of the electromagnetic wave absorber falls within a range of 1000 g/m | 10-27-2011 |
20110273319 | TUNABLE NEGATIVE PERMEABILITY BASED DEVICES - Negative permeability metamaterials and devices based on negative permeability metamaterials are described. The invention presents a new paradigm for realizing electromagnetic devices utilizing naturally available magnetic materials operating in their negative permeability spectrum. The superior advantages of negative permeability materials are utilized for providing unique electromagnetic devices including, for example, small antennas, array sensors and imaging devices. Since the property of the magnetic materials can be tuned by applying a DC magnetic field, the materials and devices of the present invention can be tunable. | 11-10-2011 |
20120119932 | Radar module - An integrated antenna package includes an interposer, an integrated circuit die, and a cap that forms a cavity within the integrated antenna package. A lossy EBG structure resides at the cap overlying the integrated circuit device. A lossless EBG structure resides at the cap overlying a microstrip feedline. A radar module includes a plurality of receive portions, each receive portion including a parabolic structure having a reflective surface, an absorber structure, a lens, and an antenna. | 05-17-2012 |
20120188114 | MULTI-LAYERED ELECTROMAGNETIC WAVE ABSORBER AND MANUFACTURING METHOD THEREOF - A multi layer electromagnetic wave absorber is provided. The absorber includes a surface layer comprising at least one of a dielectric lossy mixture and a magnetic lossy mixture, an absorption layer, laminated on a rear side of the surface layer, comprising: a dielectric lossy mixture having a higher loss than the dielectric lossy mixture for the surface layer, and a magnetic lossy mixture having a higher loss than the magnetic lossy mixture for the surface layer, and a boundary layer, laminated on a rear side of the absorption layer, comprising a conductive material. | 07-26-2012 |
20130063296 | MICROWAVE ABSORBING COMPOSITION - The present invention relates to a microwave absorbing composition comprising:
| 03-14-2013 |
20130069813 | ANTENNA BEAM CONTROL ELEMENTS, SYSTEMS, ARCHITECTURES, AND METHODS FOR RADAR, COMMUNICATIONS, AND OTHER APPLICATIONS - The present invention provides, among other things, antenna beam control devices, systems, architectures, and methods for radar and other applications, such as wireless communications, etc., to improve transmit and/or receive performance of the devices and systems employing such antennas by deploying beam control elements ( | 03-21-2013 |
20130099956 | APPARATUS TO REDUCE SPECIFIC ABSORPTION RATE - In described embodiments, a user is protected from potential health risks from emitted RF energy from a wireless handset or other device by reducing Specific Absorption Rate (SAR) of the device while avoiding, or even improving, the radiation pattern of the antenna. For example, a hat, cap or other covering of a device user's upper body includes a dual-layer structure comprising of carbon-loaded, open cell foam with a metalized layer. The dual-layer structure is imbedded in, for example, a hat with the carbon loaded foam facing away from the user's head. The covering provides for RF protection of the user to reduce SAR while maintaining relatively good return loss characteristics, thereby avoiding a negative impact on the desired antenna radiation pattern of the device. | 04-25-2013 |
20130106639 | ELECTROMAGNETIC ANECHOIC CHAMBER | 05-02-2013 |
20130135135 | WIND TURBINES - A wind turbine having a tower and at least one radar-absorbing panel attached to an outer surface of the tower is described. The panels are attached by mounts that do not penetrate the outer surface of the tower. In preferred embodiments of the invention, the mounts attach magnetically to the outer surface of the tower. | 05-30-2013 |
20130257638 | ELECTROMAGNETIC ANECHOIC CHAMBER - An electromagnetic anechoic chamber includes an anechoic chamber and a supporting bracket. A sidewall of the anechoic chamber defines an opening. The supporting bracket includes a shielding piece rotatably mounted to the anechoic chamber to cover the opening, and two test benches respectively fixed to two opposite side surfaces of the shielding piece. When an item of information technology equipment (ITE) is assembled to one of the test benches and the supporting bracket is rotated to make the shielding piece cover the opening and the ITE enter the anechoic chamber, the other test bench is exposed out of the chamber and another piece of ITE can be assembled thereon. | 10-03-2013 |
20130257639 | RADIOWAVE ABSORBER - A radiowave absorber of an embodiment includes: core-shell particles each including: a core portion that contains at least one magnetic metal element selected from a first group including Fe, Co, and Ni, and at least one metal element selected from a second group including Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, rare-earth elements, Ba, and Sr; and a shell layer that coats at least part of the core portion, and includes an oxide layer containing at least one metal element selected from the second group and contained in the core portion; and a binding layer that binds the core-shell particles, and has a higher resistance than the resistance of the core-shell particles. The volume filling rate of the core-shell particles in the radiowave absorber is not lower than 10% and not higher than 55%. | 10-03-2013 |
20130285846 | NEAR-FIELD ELECTROMAGNETIC WAVE ABSORBER - A near-field electromagnetic wave absorber formed by adhering pluralities of electromagnetic-wave-absorbing films each having a thin metal film formed on a surface of a plastic film, the thin metal film of at least one electromagnetic-wave-absorbing film having a thin film layer of a magnetic metal, and a large number of substantially parallel, intermittent linear scratches being formed in plural directions with irregular widths and irregular intervals on the thin metal film of at least one electromagnetic-wave-absorbing film. | 10-31-2013 |
20130307714 | Passive Millimeter Wave Imaging System with Environmental Control for Concealed Object Detection - Embodiments of the present innovation relate to a system and technique for passive millimeter wave imaging for concealed object detection. In one arrangement, millimeter wave imaging is provided in conjunction with an environment which is, radiometrically, at a lower temperature than the human subject. In one arrangement, the environment is configured as part of a system wherein the subject may easily pass into the system for scanning and then out of the system. Size of the overall system is minimized. Furthermore, the system includes a structure configured with sufficient strength to withstand reasonable abuse but, at the same time, is substantially transparent to the radiometric wavelengths being employed. | 11-21-2013 |
20130335253 | ELECTROMAGNETIC ANECHOIC CHAMBER - An electromagnetic anechoic chamber includes an anechoic chamber, an adjusting apparatus, and an antenna device. The anechoic chamber includes a bottom wall defining a rectangular receiving space, and a shielding plate supported on a bottom wall. The adjusting apparatus is received in the receiving space and includes a supporting bracket, two adjusting pulleys respectively installed to two opposite ends of the supporting bracket, and a transmission belt wrapping around the adjusting pulleys. The antenna device includes a base slidably supported on the supporting bracket and an adjusting pole perpendicularly extending up from the base. The adjusting pole extends through the transmission belt and the shielding plate. A motor drives one of the adjusting pulleys to rotate, the transmission belt is moved through the adjusting pulley to move the antenna device. | 12-19-2013 |
20140028484 | ELECTROMAGNETIC ANECHOIC CHAMBER - An electromagnetic anechoic chamber for testing information technology equipments (ITE) includes an anechoic chamber, a test bench installed in the anechoic chamber, and two tables for supporting the ITE. The tables slide in the anechoic chamber in turn. The test bench includes a first supporting plate defining two substantially parallel slide grooves and a through hole between the slide grooves, and a lift apparatus installed to a bottom of the first supporting plate. Each table includes an uninterruptible power system (UPS) detachably installed to the table. The lift apparatus includes a second supporting plate slidably received in the through hole from top to bottom. Each table slides on the first supporting plate along the slide grooves, until a corresponding UPS is supported on the second supporting plate. The lift apparatus moves the second supporting plate down, so that, the UPS is received in the through hole. | 01-30-2014 |
20140043181 | SYSTEMS AND METHODS OF ANTENNA ORIENTATION IN A POINT-TO-POINT WIRELESS NETWORK - An exemplary method comprises positioning a first antenna to receive a first signal from a second antenna, the second antenna comprising energy absorbing material that functions to expand beamwidth, receiving the first signal from the second antenna, detecting a plurality of gains based on the first signal, repositioning the first antenna relative to the second antenna to a position associated with an acceptable gain based on the first signal, removing at least some of the energy absorbing material from the second antenna to narrow the beamwidth of the second antenna, receiving, by the first antenna, a second signal from the second antenna, detecting a plurality of gains based on the second signal, and repositioning the first antenna relative to the second antenna to a position associated with an increased gain of the plurality of gains based on the second signal, the increased gain being greater than the acceptable gain. | 02-13-2014 |
20140070977 | OFF-BOARD INFLUENCE SYSTEM - An influence system including open cell structures with one or more fractal reflective or resonating structures, wherein the fractal reflective or resonating structures are adapted to produce an emitted reflective or resonance signal that approximately matches a target electromagnetic signal reflection or resonance profile comprising a plurality of electromagnetic signal characteristics, said plurality of electromagnetic signal characteristics, a tow yoke coupled to one end of said blanket comprising a floatation chamber section, a tow cable adapted to tow said tow yoke and blanket, said tow cable comprising a low electromagnetic observable material or having a radar absorptive material coating. | 03-13-2014 |
20140091961 | METHODS AND APPARATUS FOR EVALUATING RADIATED PERFORMANCE OF MIMO WIRELESS DEVICES IN THREE DIMENSIONS - According to some embodiments, a system is provided for simulating a cluster of reflections. The system includes an array of antenna elements distributed in space over a solid angle having an angular spread. The solid angle is substantially less than a full sphere and each antenna element has a spatial orientation. The system also includes a spatial environment simulator connected to the antenna elements and configured to apply one of excitations to the antenna elements and weights to signals from the antenna elements. The combination of the spatial distribution of the antenna elements, the orientation of the antenna elements, and the weighting applied by the variable path simulator simulates a near field arising from a cluster of reflections of a multipath environment. | 04-03-2014 |
20140104092 | RADIATION SIGNAL MEASUREMENT SYSTEM FOR MILLIMETER WAVE TRANSCEIVERS - A radiation signal measurement system for millimeter wave transceivers is disclosed. Embodiments of the present invention utilize a laser to align the laser with an antenna. The transceiver is then moved into the path of the laser to align the laser with the transceiver. The transceiver or antenna orientation is changed such that the transceiver and antenna face each other, in an aligned position. Millimeter wave absorber material is applied to the inside and outside of the testing chamber to minimize reflections and interference from outside sources. | 04-17-2014 |
20140111363 | RADIO FREQUENCY SHEILDED CLOTHING - Clothing for shielding a person from radio frequency energy relating to an electronic device includes a garment adapted to be worn by the person that includes at least one pocket having an inner panel and an outer panel. The pocket is sized to bold the electronic device. The inner panel of the pocket includes an electrically conductive shield material. | 04-24-2014 |
20140118177 | RADAR ABSORBING MATERIAL COMPATIBLE WITH LIGHTNING PROTECTION SYSTEMS - A wind turbine component incorporating radar-absorbing material having increased compatibility with lightning protection systems is described. The radar absorbing material includes a ground plane having an electrical conductivity and/or a dielectric constant that is higher in the presence of an electric field having a frequency of 1 GHz and above than in the presence of an electric field having a frequency of 10 MHz and below. Suitable materials for the ground plane include ferroelectric and ferrimagnetic materials and percolating material combinations, all of which have frequency-dependent properties that can be tuned to make the ground plane highly reflective at radar frequencies and benign at lightning discharge frequencies. | 05-01-2014 |
20140132439 | ELECTROMAGNETIC WAVE ABSORBER - An electromagnetic wave absorber contains cement and carbon nanotubes and has an absolute value of a complex relative permittivity in a range of from 2.0 to 10.0 in a frequency range of from 1 to 110 GHz and a minimum value of a dissipation factor of 0.35 or greater in the frequency range of from 1 to 110 GHz. | 05-15-2014 |
20140145869 | BOUNDARY RADIATION PREVENTION STRUCTURE AND ELECTRONIC CABINET AND ELECTRONIC WORKING PLATFORM USING THE BOUNDARY RADIATION PREVENTION STRUCTURE - The invention provides a boundary radiation prevention structure, comprising: a metal portion, and a guide portion. The metal portion has an incident plane adapted to block an incident electromagnetic wave, wherein the incident electromagnetic wave induces an induced current on the incident plane. The guide portion is located on one border of the incident plane and has a curved surface electrically connected to the metal portion for the induced current to pass through, wherein the curved surface is covered by an absorption layer for absorbing the incident electromagnetic wave and a boundary radiation generated from the induced current radiation. | 05-29-2014 |
20140240159 | Electromagnetic Radiation Absorber - A radiation absorber comprising multiple layers has a conducting base layer, and at least first and second further layers, each separated by a dielectric material, the first and second layers having patches thereon of highly conducting material, and defining resonant cavities in cooperation with the dielectric material, wherein the resonant cavities formed on adjacent layers differ in frequency. Characteristics of the patch, such as size or shape may vary on each layer to provide different resonant frequencies, and/or dielectric or magnetic properties of the dielectric material, and/or separation distance of the patches may be varied. In some embodiments, complex dielectrics may have their loss factors adapted to tune a resonant frequency, or to adapt its resonant bandwidth. | 08-28-2014 |
20140266849 | METHOD AND APPARATUS FOR CREATING PERFECT MICROWAVE ABSORBING SKINS - A method and apparatus for producing a radio frequency absorber (RFA) or perfect microwave absorber (PMA) skin is described herein. A metamaterial layer may be applied to a low dielectric substrate. Resistive and capacitive components may then be added to the metamaterial layer. The metamaterial layer may then be formed into an RFA or PMA skin, which may then be applied to a multi-layered assembly for absorption of electromagnetic radiation in a frequency range such as the microwave frequency spectrum in a final product including but limited to cell phones, communication devices, or other electronic devices. | 09-18-2014 |
20140266850 | METHOD AND APPARATUS FOR CREATING PERFECT MICROWAVE ABSORBING PRINTED CIRCUIT BOARDS - A method and apparatus for producing a radio frequency absorbing (RFA) or perfect microwave absorbing (PMA) printed circuit board (PCB) is described herein. A metamaterial layer may be applied to a low dielectric substrate. Resistive and capacitive components may then be added to the metamaterial layer. The metamaterial layer may then be formed into an RFA or PMA PCB, which may comprise a multi-layered assembly for absorption of electromagnetic radiation in a targeted frequency range such as the microwave frequency range in the PCB. | 09-18-2014 |
20140354462 | RADAR DEVICE FOR BEHIND WINDSHIELD INSTALLATIONS - A ground vehicle radar system includes a windshield of the ground vehicle and a radar device installed behind the windshield. The windshield includes a metallization layer configured to inhibit propagation of infrared radiation through the windshield that also inhibits the propagation of radar signals. The metallization layer defines an opening in the metallization layer for radar signals emitted and detected by a radar device to pass through. An antenna of the radar device is installed behind the windshield and aligned with the opening. A lower portion of the antenna has a first field of view through the opening characterized as being directed horizontal toward a horizon forward of the vehicle. An upper portion of the antenna has a second field of view through the opening characterized as being directed downward toward an area of the ground forward of the vehicle. | 12-04-2014 |
20140354463 | RADIO WAVE ABSORBER - An object of the present invention is to provide a radio wave absorber at low cost that has an excellent radio wave absorption property for absorbing microwaves and millimeter waves and hardly deteriorates the radio wave absorption property even after exposure to high-power radio waves. Specifically, the radio wave absorber according to the present invention for absorbing the microwaves and the millimeter waves is characterized in having a base material made of a porous compact containing composite oxide of calcium and aluminum; and a conductive material added to the base material. | 12-04-2014 |
20150022389 | RADAR SENSOR - The invention relates to a radar sensor including a radar antenna, a radar lens and a funnel element between the radar antenna and the radar lens. The funnel element includes a material which absorbs the radar radiation emitted by the radar antenna. | 01-22-2015 |
20150042502 | ELECTROMAGNETIC RADIATION ATTENUATOR - The invention relates to a material configured such as to include a plurality of layers, some layers being made of a composite material and some layers being made of a dielectric material. The layers of composite material include a mixture of host dielectric material and inclusions, such that said inclusions are embedded in the structure of the host dielectric material. Said inclusions preferably include highly conductive fibres, specifically metal microwires. Thus, the structure of the material according to the invention includes a plurality of layers, some layers being made of a composite material, which includes a host dielectric material with inclusions, and some layers being made of a dielectric material. The structure of the material according to the invention is designed so that the surface on which said material is applied is capable of absorbing a portion of the incident electromagnetic radiation, thus substantially reducing the electromagnetic radiation reflected by same curved. | 02-12-2015 |
20150048962 | ELECTROMAGNETIC ANECHOIC CHAMBER AND UNIFORM FIELD AREA TESTING APPARATUS - An electromagnetic anechoic chamber includes a chamber, an antenna mounted therein at a first end, a test bench mounted therein at a second end, and a uniform field area (UFA) testing apparatus. The UFA testing apparatus includes a supporting bar horizontally mounted, a sliding member on the supporting bar, a first driving mechanism to move the sliding member, an upright toothed rack movably supported by the sliding member, a second driving mechanism rotating a gear on the supporting bar to lift or drop the upright rack, and a field intensity probe mounted to a bottom end of the rack. The first driving mechanism and the second driving mechanism can position the field intensity probe at any planar point inside the chamber to avoid any manual repositioning of the field intensity probe during testing. | 02-19-2015 |
20150061914 | RADIATION ATTENUATING CLOTHING - A pocket structure for a garment for a body of a wearer to reflect radio frequency radiation from a radiating device positioned therein. The pocket structure includes a first wall of fabric and a second wall of fabric, the first and second walls of fabric being attached along a major portion of their respective peripheral edges and forming an opening on a minor portion of their respective peripheral edges. The opening and the first and second walls of fabric forming an expandable compartment, each of the first wall of fabric and the second wall of fabric having an inner side facing the expandable compartment and an outer side, the opening being attached to the garment so as to position the second wall of fabric closer to the body of the wearer. The pocket structure further includes an electrically conductive material associated with the inner side of the second wall of fabric. | 03-05-2015 |
20150084803 | RADAR SENSOR ANTENNA WITH ANTI-REFLECTION ELEMENT - An antenna for a radar sensor includes an emitter element, a receiver element, and an anti-reflection element. The emitter element is configured to direct the emitted signal along a boresight that intersects a fascia. The receiver element is configured to detect a reflected signal reflected by an object located beyond the fascia. The anti-reflection element is configured to reduce reflection by the antenna of an early-reflection portion reflected by the fascia. | 03-26-2015 |
20150084804 | MAGNETIC METAL PARTICLE AGGREGATE AND RADIO WAVE ABSORBER - A magnetic metal particle aggregate includes a plurality of magnetic metal particles including at least one magnetic metal selected from a first group consisting of Fe, Co, and Ni. The plurality of magnetic metal particles are partly bound with each other, and an average particle diameter of the plurality of magnetic metal particles is 10 nm or more and 50 nm or less. The magnetic metal particle aggregate has an average particle diameter of 15 nm or more and 200 nm or less. | 03-26-2015 |
20150138009 | WIDE-FREQUENCY WAVE-ABSORBING METAMATERIAL, ELECTRONIC DEVICE AND METHOD FOR OBTAINING WIDE-FREQUENCY WAVE-ABSORBING METAMATERIAL - The disclosure discloses a wide-frequency wave-absorbing metamaterial, which comprises a plurality of layers of substrates and microstructures respectively arranged on the substrates at different layers. The wave-absorbing frequency band of the wide-frequency wave-absorbing metamaterial is relatively wide. The disclosure further discloses an electronic device and a method for obtaining a wide-frequency wave-absorbing metamaterial. By using the foregoing manner, the disclosure can enable a wave-absorbing metamaterial to significantly increase a wave-absorbing bandwidth based on a relatively good electromagnetic wave absorbing effect. | 05-21-2015 |
20150303583 | RADIO WAVE ABSORBER - A radio wave absorber according to an embodiment includes a plurality of metal particles including at least one kind of magnetic metal element selected from a first group of Fe, Co, and Ni. Each of the plurality of metal particles has a linear expansion coefficient of 1×10 | 10-22-2015 |
20160072192 | METAL PATTERN ON ELECTROMAGNETIC ABSORBER STRUCTURE - A metal pattern formed in the electromagnetic absorber structure is provided. By performing the laser treatment to form the active layer thereon, the metal pattern can be regionally formed on the electromagnetic absorber structure in the following electroless plating processes. | 03-10-2016 |
20160164187 | ELECTROMAGNETIC WAVE ABSORBER AND FILM FORMING PASTE - A radio wave absorber provided with a radio wave absorbing film formed on a substrate, the radio wave absorber being capable of absorbing radio waves over a broad frequency band and exhibiting superior radio wave absorbing properties even with a radio wave absorbing film thinner than 1 mm. A film forming paste suitable for forming a radio wave absorbing film that is provided in the radio wave absorber. In a radio wave absorber provided with a radio wave absorbing film formed on a substrate, a particular epsilon-type iron oxide is employed in the radio wave absorbing film and relative permittivity of the radio wave absorbing film is set to 6.5 to 65. | 06-09-2016 |