| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 342004000 | With particular geometric configuration | 21 |
| 20090015456 | ANECHOIC STRUCTURES FOR ABSORBING ELECTROMAGNETIC INTERFERENCE IN A COMMUNICATIONS MODULE - A communications module includes an interior configuration designed to intercept, disrupt, and scatter EMI produced by the module during operation. The interior configuration may include an anechoic structure that includes a plurality of anechoic elements positioned proximate EMI-producing components within the module. The anechoic elements may form truncated pyramids, columns having rounded tops, cones, or other shapes. The anechoic elements may be uniform or non-uniform in size, length, or shape and can be arranged in a periodic, non-periodic, or random pattern. In some embodiments, the anechoic elements may include cast zinc metal, Nickel, and/or radiation absorbent material, such as a mixture of iron and carbon. In operation, EMI impinging on the anechoic elements is scattered by their surfaces until absorbed by the elements or other structures of the module, thereby preventing the EMI from exiting the module. | 01-15-2009 |
| 20090021416 | All-Weather Radio Wave Absorber Having Reflector and Object Into Which Such Absorber Is Integrated - The present invention provides an all-weather radio wave absorber having reflector capable of smoothly attenuating harmful microwave or millimeter wave from 400 MHz to 100 GHz generated from various electronic devices so that bad effects on human body or electronic device can be eliminated. The all-weather radio wave absorber having reflector comprises a laminated radio wave absorbing composite comprising a foamed upper radio wave absorber | 01-22-2009 |
| 20090128393 | Vehicle integrated antenna - A method for manufacturing an antenna or antenna array and the antenna or antenna array itself with an operating frequency band, including antenna elements. The antenna or antenna array is integrated in a vehicle structure wherein a radar absorbing material structure, conforming to the shape of the vehicle structure and including at least one layer of radar absorbing material with an inner surface facing the antenna element and an outer surface being an outer surface of the vehicle structure, is mounted in front of the antenna elements. Each radar absorbing material-layer is defined by a thickness and frequency dependent radar absorbing material properties: relative permittivity relative permeability. The frequency dependency of the radar absorbing material properties are tailored and the thickness and the number of radar absorbing material layers is selected such that the radar absorbing material structure is substantially transparent in the operating band, reaching a predetermined Farfield pattern requirement, and simultaneously is an effective absorber, reaching a predetermined Radar Cross Section requirement, at frequencies in a threat band comprising frequencies above the operating frequency band of the antenna, and a radar cross section requirement in the operating frequency band. | 05-21-2009 |
| 20100182188 | Radio Wave Absorber And Producing Method Thereof - In order to provide a radio wave absorber that can be produced easily and has excellent radio wave absorption characteristics, a conductive surface | 07-22-2010 |
| 20100231434 | Structure - A structure, and a method for modifying the design of a structure, are provided such that the structure includes features designed to reduce and preferably minimize the radar cross-section of the structure over one or more predetermined frequency ranges. A structure is provided having an inclined surface, wherein the angle of inclination is selected for which the level of radar cross section is below a local maximum in the sidelobes in each of the scattering patterns of incident electromagnetic radiation at frequencies within one or more predetermined frequency ranges. In the particular case of a tower, for example of a wind turbine, the radar cross-section of the tower may be minimized for two or more radar bands by appropriate selection of the angle of inclination of a frusto-conical portion of the tower. Ideally, the tower is constructed entirely in the form of a cone frustum. | 09-16-2010 |
| 20100253564 | REDUCING RADAR SIGNATURES - A structure and a method for modifying an existing design of structure are provided, wherein the structure is provided to at least partially enclose an object that has a large radar cross section. The structure comprises a non-metallic portion having a radar-reflective layer applied to an inclined surface of the structure. The inclined surface is arranged with one or more angles of inclination selected so that the radar cross-section for the structure has a value that is lower than that for the object enclosed in one or more frequency ranges. In a preferred variation, an at least partially detached and appropriately shaped radar-reflective structure may be provided as an alternative to or to supplement the modification of an existing enclosure. | 10-07-2010 |
| 20110095932 | Absorber Assembly for an Anechoic Chamber - An electromagnetic absorber assembly ( | 04-28-2011 |
| 20110279301 | RF ANECHOIC CHAMBER - A rectangular RF anechoic chamber, where the material or absorbing material attached to its feeding wall has a homogeneous property on X-Y plane, i.e. the plane parallel to the feeding wall. The MA(s) are mounted on the feeding wall from which the material with a homogeneous property will reduce interferences from the fields which produce scattered fields from the wall; and may produce a quiet zone with significantly improved quality, and specially at low frequency band. Quiet zone quality means the field uniformity in the test zone. | 11-17-2011 |
| 20120162001 | ELECTROMAGNETIC WAVE REVERBERATION CHAMBER - An electromagnetic wave reverberation chamber includes: an electromagnetic wave absorbing apparatus installed in an intended space of the electromagnetic wave reverberation chamber for adjusting a reflection characteristic of an inside of the electromagnetic wave reverberation chamber, wherein the electromagnetic wave absorbing apparatus have an electromagnetic bandgap structure including a plurality of unit cells arranged periodically. | 06-28-2012 |
| 20130050006 | ELECTROMAGNETIC WAVE REVERBERATION CHAMBER - An electromagnetic wave reverberation chamber formed in the shape of a polyhedron includes an electromagnetic wave absorbing apparatus installed on at least one wall of metal conductors of the electromagnetic wave reverberation chamber. The electromagnetic wave absorbing apparatus having a shape of a roll screen and includes an electromagnetic wave absorbing film, a roll for rolling the one end of the electromagnetic wave absorbing film, a cover for covering the roll, and a fixing unit for fixing the other end of the electromagnetic wave absorbing film. | 02-28-2013 |
| 20130127651 | SURFACE FOR FILTERING A PLURALITY OF FREQUENCY BANDS - The invention relates to a surface suitable for filtering a plurality of frequency bands, said surface including a set of separate identical basic conductive units ( | 05-23-2013 |
| 20130147650 | ELECTROMAGNETIC ANECHOIC CHAMBER - An electromagnetic anechoic chamber includes a peripheral wall and a bottom wall. The peripheral wall is covered with wave absorbers on the inner surface thereof. The bottom wall is circular, and covered by the peripheral wall, and divided into two semicircles, one half is a reflecting ground floor, and forms a semi-anechoic chamber with the peripheral wall thereon; the other half is covered with wave absorbers, and forms a fully anechoic chamber with the peripheral wall thereon. | 06-13-2013 |
| 20130222171 | RADIO-FREQUENCY (RF) PRECISION NULLING DEVICE - An exemplary interference nulling system includes an electromagnetic energy (e.g., RF) based system such as a radar system for transmitting radar signals and receiving return signals reflected from a target, and a nulling device having a surface for diffracting/blocking the transmitted signals to electromagnetically obscure the target. The nulling device is preferably sited between the transmitter and the target in a blanking range of the radar system. | 08-29-2013 |
| 20130335255 | GRAPHENE BASED STRUCTURES AND METHODS FOR BROADBAND ELECTROMAGNETIC RADIATION ABSORPTION AT THE MICROWAVE AND TERAHERTZ FREQUENCIES - Structures and methods for cloaking an object to electromagnetic radiation at the microwave and terahertz frequencies include disposing a plurality of graphene sheets about the object. Intermediate layers of a transparent dielectric material can be disposed between graphene sheets to optimize the performance. In other embodiments, the graphene can be formulated into a paint formulation or a fabric and applied to the object. The structures and methods absorb at least a portion of the electromagnetic radiation at the microwave and terabyte frequencies. | 12-19-2013 |
| 20140104093 | ELECTROMAGNETIC ANECHOIC CHAMBER - An electromagnetic anechoic chamber includes an anechoic chamber having a sidewall and a top wall, and a number of hexagonal ferrite plates mounted on inner surfaces of the sidewall or the top wall. The ferrite plates are tightly arranged in a honeycomb layout. An edge length of each ferrite plate is less than a quarter of wavelength of electromagnetic wave which is required to be absorbed by the ferrite plates. | 04-17-2014 |
| 20140111365 | ARTIFICIAL MICROSTRUCTURE AND ARTIFICIAL ELECTROMAGNETIC MATERIAL USING THE SAME - The present invention provides an artificial microstructure. The artificial microstructure includes at least three split rings. The at least three split rings surround and embed in turn. Each split ring is formed by a wire which is made of conductive material, with two terminals of the wire towards each other to form an opening of the corresponding split ring. The present invention also provides an artificial electromagnetic material using the artificial microstructure. The artificial electromagnetic material with the artificial microstructure can achieve the function of broadband wave-absorbing. | 04-24-2014 |
| 20140132440 | ELECTROMAGNETIC WAVE ABSORBER - An electromagnetic wave absorber includes a rectangular plate-shaped part having a surface including a flat space at a center of the plate-shaped part and a plurality of oblong rectangular spaces, surrounding the flat space, on each of which at least one pyramidal or wedge-shaped part having an oblong rectangular bottom face is provided, and the plurality of oblong rectangular spaces of the surface of the plate-shaped part are arranged along inside a perimeter of the plate-shaped part so that a longer side of any one of the plurality of oblong rectangular spaces is adjoining with a shorter side of another of the plurality of oblong rectangular spaces adjacent thereto while leaving the flat space at the center of the plate-shaped part. | 05-15-2014 |
| 20140375490 | RADAR DEVICE FOR A MOTOR VEHICLE, SECURING DEVICE FOR A RADAR APPARATUS AND METHOD FOR MANUFACTURING AN ABSORPTION ELEMENT FOR A RADAR APPARATUS - The invention relates to a radar device ( | 12-25-2014 |
| 20150340766 | ELECTROMAGNETIC WAVE ABSORBER AND ELECTROMAGNETIC WAVE ANECHOIC ROOM - An electromagnetic wave absorber and an electromagnetic wave anechoic room using the absorbers. The electromagnetic wave absorber has improved electromagnetic wave absorption characteristics at high frequencies in spite of having a hollow structure. The electromagnetic wave absorber includes a hollow shell with a bottom that is a rectangle. A part of a surface of the hollow shell and an outer face of a planar extension lie in planes that are not parallel to any side of the rectangle. At least the plane that is not parallel to any side of the rectangle is included in a surface of an electromagnetic wave absorption member. | 11-26-2015 |
| 20150380830 | ARTIFICIAL MICROSTRUCTURE AND ARTIFICIAL ELECTROMAGNETIC MATERIAL USING THE SAME - The present invention provides an artificial microstructure. The artificial microstructure includes at least three split rings. The at least three split rings surround and embed in turn. Each split ring is formed by a wire which is made of conductive material, with two terminals of the wire towards each other to form an opening of the corresponding split ring. The present invention also provides an artificial electromagnetic material using the artificial microstructure. The artificial electromagnetic material with the artificial microstructure can achieve the function of broadband wave-absorbing. | 12-31-2015 |
| 20160087342 | CIRCUIT-LOADED CONFORMAL METASURFACE CLOAK - An electromagnetic invisibility cloaking device with a broadened cloaking bandwidth and/or a tunable frequency of operation. The cloaking device includes an object (e.g., antenna) and a metasurface ( | 03-24-2016 |
