| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 343909000 | Refracting means and radio wave energy filters (e.g., lenses and polarizers) | 76 |
| 20080204355 | Frequency Selective Surfaces - A freestanding frequency selective surface (FSS) is provided which comprises at least one shorted resonance aperture element ( | 08-28-2008 |
| 20080231543 | METHOD AND SYSTEM FOR EQUALIZING ANTENNA CIRCUIT MATCHING VARIATIONS - Aspects of a method and system for equalizing antenna circuit matching variations may include adjusting a frequency response of an antenna via a programmable filter and a gain of the antenna by varying a programmable amplifier. The antenna frequency response and the antenna gain may be adjusted dynamically and/or autonomously. The programmable amplifier and the programmable filter may be adjusted sequentially or simultaneously. The programmable filter may be an LC-type circuit and the programmable amplifier may be a low-noise amplifier. In an exemplary embodiment of the invention, the programmable filter may comprise a programmable capacitance in a matrix arrangement and/or a programmable inductance in a matrix arrangement. | 09-25-2008 |
| 20080272982 | HIGH IMPEDANCE ELECTROMAGNETIC SURFACE AND METHOD - A high impedance surface ( | 11-06-2008 |
| 20080284674 | Digital control architecture for a tunable impedance surface - A digitally controlled tunable impedance surface. The tunable impedance surface is of the type having a two dimensional array of conducting plates disposed adjacent a dielectric medium; a ground plane spaced from the two dimensional array of conducting plates, the dielectric medium occurring at least between and separating the two dimensional array of conducting plates and the ground plane; and conductors coupling alternating ones of the conducting plates to the ground plane. A plurality of voltage controlled capacitors are coupled between adjacent plates in the two dimensional array of conducting plates and an array of digital to analog converters are disposed preferably on or near the ground plane. Each digital to analog converter has analog output voltage pads coupled to selected ones of adjacent conducting plates and has at least a digital input for receiving digital words representing at least in part analog voltages to be applied to the selected ones of the adjacent conducting plates. The digital to analog converter may also have a digital output for serially coupled the received digital data words to downstream connected digital to analog converters. | 11-20-2008 |
| 20090109119 | Adjustable Paneling System for a Phasing Structure - A phasing structure includes a support matrix for a reflective surface which reflects microwaves within an operation frequency band. The reflective surface includes a plurality of adjustable sub-panels. In one embodiment, the phasing structure may include a phasing arrangement of electromagnetically-loading structures supported by the support matrix. The sub-panels may be secured to the support matrix and individually adjustable using a securing means which, in one embodiment, includes one or more differential bolts matrix. | 04-30-2009 |
| 20090109120 | Low Windload Phasing Structure - A microwave phasing structure configured to reflect microwaves within an operation frequency band includes a planar array of phasing. The plurality of phasing elements may be supported by a support grid having a first predefined spacing interval. The phasing structure may include a planar pattern including a plurality of openings having a second predefined spacing interval. The phasing structure may include a support means for securing the phasing array and the planar pattern substantially in parallel. | 04-30-2009 |
| 20090128445 | Apparatus For Attenuating Reflections Of Electromagnetic Waves, Method For Its Manufacture And Its Use - A device for attenuating reflections of an electromagnetic wave impinging thereon and a method of making the device. The device includes a structured film comprised of at least one of a ferromagnetic and ferrimagnetic material. The structured film has a structure and a uniform film portion of the at least one of a ferromagnetic and ferrimagnetic material underneath the structure such that the structured film has at least two different resonance frequencies. | 05-21-2009 |
| 20090135086 | RESOLUTION RADAR USING METAMATERIALS - A radar system includes at least one transmit array comprising a plurality of metamaterial elements. The radar system further includes at least one near-field stimulator for inputting electromagnetic signal to the transmit array so that a sub-wavelength target is illuminated with an electromagnetic wave. | 05-28-2009 |
| 20090135087 | Metamaterial Structures with Multilayer Metallization and Via - Techniques and apparatus based on metamaterial structures are provided for antenna and transmission line devices, including multilayer metallization metamaterial structures with one or more conductive vias connecting conductive parts in two different metallization layers. | 05-28-2009 |
| 20090179823 | Left-Handed Medium Using No Via - A two-dimensional structure medium comprising a conductor pattern as unit cells formed on the upper surface of a substrate and a conductor pattern formed on the lower surface of the substrate and exhibiting a left-handed characteristic achieved without using a via by utilizing the interaction between an inductance component formed by connecting a part of a floating island pattern out of the conductor pattern on the lower surface of the substrate with a pattern as the ground portion and a capacitance component of parallel-plate mode formed by the conductor pattern on the upper surface of the substrate and the conductor pattern on the lower surface of the substrate. | 07-16-2009 |
| 20090201221 | METHOD AND APPARATUS FOR REDUCED COUPLING AND INTERFERENCE BETWEEN ANTENNAS - Examples of the present invention include antennas and scattering elements having a metamaterial cloak configured so as to reduce effects on the operating parameters of a nearby antenna. For example, an antenna has an antenna frequency, and a cloak is disposed around the antenna having a frequency range in which the cloak is operative. The antenna frequency can lie outside the frequency range of the cloak, whereas the frequency of a second antenna lies within the frequency range of the cloak. In this case, the antenna is cloaked relative to the second antenna. | 08-13-2009 |
| 20090237322 | FERROELECTRIC LENS | 09-24-2009 |
| 20090237323 | Apparatus and method for reducing electromagnetic waves - An apparatus for reducing electromagnetic waves, includes an electromagnetic bandgap for reducing a surface current induced by electromagnetic waves that are emitted from a radiator; and an absorber for reducing a surface current around the electromagnetic bandgap and for diminishing diffracted waves radiated from an end of a terminal. | 09-24-2009 |
| 20090273538 | INDEFINITE MATERIALS - A compensating multi layer material includes two compensating layers adjacent to one another. A multi-layer embodiment of the invention produces sub-wavelength near-field focusing, but mitigates the thickness and loss limitations of the isotropic “perfect lens.” An antenna substrate comprises an indefinite material. | 11-05-2009 |
| 20090303154 | Apparatus for Sub-Wavelength Near-Field Focusing of Electromagnetic Waves - Planar sub-wavelength structures provide superlensing, i.e., electromagnetic focusing beyond the diffraction limit. The planar structures use diffraction to force the input field to converge to a spot on the focal plane. The sub-wavelength patterned structures manipulate the output wave in such a manner as to form a sub-wavelength focus in the near field. In some examples, the sub-wavelength structures may be linear grating-like structures that can focus electromagnetic radiation to lines of arbitrarily small sub-wavelength dimension, or two dimensional grating-like structures and Bessel (azimuthally symmetric) structures that can focus to spots of arbitrarily small sub-wavelength dimensions. The particular pattern for the sub-wavelength structures may be derived from the desired focus. Some examples describe sub-wavelength structures that have been implemented to focus microwave radiation to sub-wavelength dimensions in the near field. | 12-10-2009 |
| 20100026606 | ANTENNA USING A PBG (PHOTONIC BAND GAP) MATERIAL, AND SYSTEM AND METHOD USING THIS ANTENNA - An antenna uses a photonic forbidden band (PFB) material in which, by default, a surface ( | 02-04-2010 |
| 20100066638 | MICROWAVE COMPONENT AND METHOD FOR MAKING THE SAME - A microwave component having an elongated flexible sheet made of a liquid crystal polymer. A first microwave pattern is printed on one side of the sheet while a second microwave pattern is printed on the other side of the sheet. The first and second patterns are mirror images of each other so that with the first and second portions of the sheet folded over so that the first portion overlies the second portion, the patterns are aligned with each other and bond together. A margin area of the sheet in between the first and second patterns is then removed to form the microwave component. | 03-18-2010 |
| 20100073261 | TUNABLE FREQUENCY SELECTIVE SURFACE - An apparatus and methods for operating a frequency selective surface are disclosed. The apparatus can be tuned to an on/off state or transmit/reflect electromagnetic energy in any frequency. The methods disclosed teach how to tune the frequency selective surface to an on/off state or transmit/reflect electromagnetic energy in any frequency. | 03-25-2010 |
| 20100079354 | Lens for Scanning Angle Enhancement of Phased Array Antennas - A method and apparatus are present for creating a negative index metamaterial lens for use with a phased array antenna. A design having a buckyball shape is created for the negative index metamaterial lens. The buckyball shape is capable of bending a beam generated by the phased array antenna to around 90 degrees from a vertical orientation to form an initial design. The initial design is modified to include discrete components to form a discrete design. Materials are selected for the discrete components. Negative index metamaterial unit cells are designed for the discrete components to form designed negative index metamaterial unit cells. The designed negative index metamaterial unit cells are fabricated to form fabricated designed negative index metamaterial unit cells. The negative index metamaterial lens is formed from the designed negative index metamaterial unit cells. | 04-01-2010 |
| 20100109971 | METAMATERIAL STRUCTURES WITH MULTILAYER METALLIZATION AND VIA - Techniques and apparatus based on metamaterial structures are provided for antenna and transmission line devices, including multilayer metallization metamaterial structures with one or more conductive vias connecting conductive parts in two different metallization layers. | 05-06-2010 |
| 20100220035 | METAMATERIAL MICROWAVE LENS - A metamaterial microwave lens having an array of electronic inductive capacitive cells in which each cell has an electrically conductive pattern which corresponds to incident electromagnetic radiation as a resonator. At least one cell has a first and second electrical sections insulated from each other and each which section has at least two legs. A static capacitor is electrically connected between one leg of the first section of the cell and one leg of the second section of the cell. A MEMS device is electrically disposed between the other legs of the first and second sections of the cell. The MEMS device is movable between at least two positions in response to an electrical bias between the first and second sections of the cell to vary the index of refraction and resonant frequency of The cell. | 09-02-2010 |
| 20100225562 | BROADBAND METAMATERIAL APPARATUS, METHODS, SYSTEMS, AND COMPUTER READABLE MEDIA - Broadband metamaterial apparatus, methods, systems, and computer readable media are disclosed, as well as exemplary embodiments that provide cloaking, beam steering, and beam focusing. In one exemplary implementation, a broadband interface structure has a front surface region and a back surface region. The broadband interface structure is arranged to provide electromagnetic energy characteristic of an apparent profile of the back surface region substantially different than an actual profile of the back surface region for electromagnetic energy received at the front surface region. | 09-09-2010 |
| 20100225563 | DUAL POLARIZATION ANTENNA STRUCTURE, RADOME AND DESIGN METHOD THEREOF - A dual polarization antenna radome includes a plurality of dielectric substrates. Each dielectric substrate provides a plurality of metal totems, and the pattern of the metal totems is unchanged after the metal totems rotate by 90 degrees around the axis perpendicular to the dielectric substrate. | 09-09-2010 |
| 20100265158 | Evanescent electromagnetic wave conversion lenses III - Apparatus, methods, and systems provide conversion of evanescent electromagnetic waves to non-evanescent electromagnetic waves and/or conversion of non-evanescent electromagnetic waves to evanescent electromagnetic waves. In some approaches the conversion includes propagation of electromagnetic waves within an indefinite electromagnetic medium, and the indefinite medium may include an artificially-structured material such as a layered structure or other metamaterial. | 10-21-2010 |
| 20100277398 | LENS FOR SCANNING ANGLE ENHANCEMENT OF PHASED ARRAY ANTENNAS - A method and apparatus for a negative index metamaterial lens. The method is used for creating a negative index metamaterial lens for use with a phased array antenna. A design is created for the negative index materials lens that is capable of bending a beam generated by the phased array antenna to around 90 degrees from a vertical orientation to form an initial design. The initial design is modified to include discrete components to form a discrete design. Materials are selected for the discrete components. Negative index metamaterial unit cells are designed for the discrete components to form designed negative index metamaterial unit cells. The designed negative index metamaterial unit cells are fabricated to form fabricated designed negative index metamaterial unit cells. The negative index metamaterial lens is formed from the designed negative index metamaterial unit cells. | 11-04-2010 |
| 20110095964 | Metamaterial Antenna with Mechanical Connection - Metamaterial antenna devices having one or more mechanical connection units made of electrically conductive materials to provide both mechanical engagement and electrical conduction for the antenna devices. | 04-28-2011 |
| 20110148738 | OPENING/CLOSING TYPE ELECTROMAGNETIC WAVE ABSORBING DEVICE - An opening/closing type electromagnetic wave absorbing device is provided. The opening/closing type electromagnetic wave absorbing device includes, a plurality of electromagnetic band gap (EBG) unit cells each of which is polygonal and selectively transmits or reflects a wave with a predetermined frequency and an opening/closing means on which the plurality of EBG unit cells are periodically arranged to selectively open and close a limited space, wherein each of the plurality of EBG unit cells includes a metallic conductive ground layer; a dielectric layer formed on the metallic conductive ground layer; an EBG unit cell pattern layer formed of a resistive material on the dielectric layer. | 06-23-2011 |
| 20110175795 | Metamaterial - A metamaterial includes a plurality of first coiled resonators and a plurality of second coiled resonators, and an outer covering for fixing the positions of the first coiled resonators and the second coiled resonators. Each of the first coiled resonators and each of the second coiled resonators are disposed such that the central axes thereof differ from each other by 90 degrees. At the same time, adjacent first coiled resonators and second coiled resonators are disposed so as to be alternately linked in the shape of a chain. The first coiled resonators are disposed in a spatially continuous manner. | 07-21-2011 |
| 20110181490 | ARTIFICIAL MAGNETIC CONDUCTOR - An artificial magnetic conductor includes a conductor layer, a ground layer, and a via. The conductor layer is formed in a first direction and includes a plurality of grid cells. The ground layer is formed in a second direction that is opposite to the first direction and generates a lower frequency than that of an artificial magnetic conductor including a plurality of grid cells having the same size as that of the plurality of grid cells of the conductor layer and a conductor plate having a form that is not modified. The via is formed between the conductor layer and the ground layer to electrically connect the conductor layer and the ground layer. | 07-28-2011 |
| 20110227809 | PATCH ANTENNA IN WIRELESS COMMUNICATION SYSTEM AND METHOD FOR MANUFACTURING THE SAME - A patch antenna in a wireless communication system includes a patch antenna unit positioned at a predetermined point on a substrate; a first cover of a high-gain metamaterial of a different structure positioned over the patch antenna unit at a first distance from the substrate on which the patch antenna unit is positioned; and a second cover of a metamaterial of an identical structure positioned over the first cover at a second distance from the first cover. The first cover has a quadrilateral grid formed only on an outer periphery of a dielectric surface of the first cover. | 09-22-2011 |
| 20120019431 | Metamaterial surfaces - An apparatus to modify an incident free space electromagnetic wave includes a block of an artificially structured material having an adjustable spatial distribution of electromagnetic parameters (e.g., ∈, μ, η, σ, and n). A controller applies control signals to dynamically adjust the spatial distribution of electromagnetic parameters in the material to introduce a time-varying path delay d(t) in the modified electromagnetic wave relative to the incident electromagnetic wave. | 01-26-2012 |
| 20120019432 | Metamaterial surfaces - An apparatus to modify an incident free space electromagnetic wave includes a block of an artificially structured material having an adjustable spatial distribution of electromagnetic parameters (e.g., ∈, μ, η, σ, and n). A controller applies control signals to dynamically adjust the spatial distribution of electromagnetic parameters in the material to introduce a time-varying path delay d (t) in the modified electromagnetic wave relative to the incident electromagnetic wave. | 01-26-2012 |
| 20120026068 | TUNABLE FREQUENCY SELECTIVE SURFACE - An apparatus and methods for operating a frequency selective surface are disclosed. The apparatus can be tuned to an on/off state or transmit/reflect electromagnetic energy in any frequency. The methods disclosed teach how to tune the frequency selective surface to an on/off state or transmit/reflect electromagnetic energy in any frequency. | 02-02-2012 |
| 20120081265 | DEPLOYABLE WIRELESS FRESNEL LENS - Apparatus and methods for enhancing the gain of a wireless signal are provided. In at least one specific embodiment, the apparatus can include a screen comprised of one or more electrically conductive regions for reflecting electromagnetic radiation and one or more non-conductive regions for permitting electromagnetic radiation therethrough. The one or more electrically conductive regions can be disposed adjacent to at least one of the one or more non-conductive regions. The apparatus can also include a support member disposed about at least a portion of the screen. The screen can be capable of collapsing by twisting the support member in opposite screw senses to form interleaved concentric sections. | 04-05-2012 |
| 20120146881 | ABSORPTIVE ELECTROMAGNETIC SLOW WAVE STRUCTURES - Electromagnetic slow wave structures (SWS) comprised of arrays of conductive obstacles are formed inside conductive parallel-plate waveguides These SWS may be formed using, for example, MEMS manufacturing processes at the wafer level on substrates including ceramic and silicon. An effective relative permittivity in the range of 15 to 40 may be obtained at millimeterwave frequencies. The SWS can be made absorptive by incorporating resistive losses in a plate of the PPW. Applications of these slow wave structures include delay lines and bootlace lens beamformers for microwave and millimeterwave antenna systems. | 06-14-2012 |
| 20120182202 | METAMATERIAL - A metamaterial comprising a plurality of unit lattices which are arrayed on a plane in a two dimensional manner and are laminated, wherein a dielectric layer is formed from a first dielectric section and a second dielectric section that is present on the same plane as the first dielectric section and has a smaller refractive index than that of the first dielectric section, wherein the first dielectric section is arranged on an upper side or a lower side of the metal cross layer forming the unit lattice including at least a portion of the crossing region, and wherein the second dielectric section is arranged on an upper side or a lower side of the metal cross layer forming the unit lattice including at least a portion of the non-crossing region. | 07-19-2012 |
| 20120326944 | METAMATERIAL STRUCTURE AND MANUFACTURING METHOD OF THE SAME - Provided are a metamaterial structure and a manufacturing method thereof. The metamaterial structure includes a dielectric layer, nanowires penetrating the dielectric layer and arranged in a spacing having negative refraction with respect to an electromagnetic wave incident on the dielectric layer, and coating layers formed between the nanowires and the dielectric layer. | 12-27-2012 |
| 20130002520 | ACTIVE METAMATERIAL DEVICE AND MANUFACTURING METHOD OF THE SAME - Provided are an active metamaterial device operating at a high speed and a manufacturing method thereof. The active metamaterial device includes a first dielectric layer, a lower electrode disposed on the first dielectric layer, a second dielectric layer disposed on the lower electrode, metamaterial patterns disposed on the second dielectric layer, a couple layer disposed on the metamaterial patterns and the second dielectric layer, a third dielectric layer disposed on the couple layer, and an upper electrode disposed on the third dielectric layer. | 01-03-2013 |
| 20130016030 | Metamaterial for Converging Electromagnetic WavesAANM Liu; RuopengAACI ShenzhenAACO CNAAGP Liu; Ruopeng Shenzhen CNAANM Ji; ChunlinAACI ShenzhenAACO CNAAGP Ji; Chunlin Shenzhen CNAANM Wang; JinjinAACI ShenzhenAACO CNAAGP Wang; Jinjin Shenzhen CN - The present disclosure relates to a metamaterial for converging electromagnetic waves, which comprises a plurality of cubic metamaterial units arranged in a first array which takes a y direction as a column direction and a z direction perpendicular to the y direction as a row direction. The metamaterial units of each row have the same refractive index, and for the metamaterial units of each column, the refractive indices thereof for the electromagnetic waves decrease gradually from a middle metamaterial unit towards two ends of the column, with variations of the refractive indices between adjacent ones of the metamaterial units increasing gradually from the middle metamaterial unit towards the two ends of the column; and the metamaterial units are anisotropic to the electromagnetic waves. The metamaterial for converging electromagnetic waves of the present disclosure can achieve the function of converging electromagnetic waves, and has a smaller thickness compared to conventional metamaterials. | 01-17-2013 |
| 20130027278 | Man-made composite material and man-made composite material antenna - The present invention relates to a man-made composite material. The man-made composite material is divided into a plurality of regions. A plane electromagnetic wave is incident on a first surface and exits in the form of a spherical wave from a second surface of the man-made composite material opposite to the first surface. Reverse extensions of the exiting electromagnetic wave intersect with each other at a virtual focus of the man-made composite material. A line connecting the virtual focus to a point on the top surface of the i | 01-31-2013 |
| 20130050058 | METAMATERIAL FOR DIVERGING AN ELECTROMAGNETIC WAVE - The present disclosure relates to a metamaterial for diverging an electromagnetic wave, which comprises at least one metamaterial sheet layer. Refractive indices of the metamaterial sheet layer are distributed in a circular form with a center of the metamaterial sheet layer, and the refractive indices remain unchanged at a same radius and increase gradually with the radius. The present disclosure changes electromagnetic parameters at each point of the metamaterial through punching or by attaching man-made microstructures so that the electromagnetic wave can be diverged after passing through the metamaterial. The metamaterial of the present disclosure features a simple manufacturing process and a low cost, and is easy to be implemented. Moreover, the metamaterial of the present disclosure has small dimensions and does not occupy a large space, so it is easy to miniaturize apparatuses made of the metamaterial of the present disclosure. | 02-28-2013 |
| 20130154902 | ARTIFICIAL ELECTROMAGNETIC MATERIAL - An artificial electromagnetic material includes at least one material sheet. Each material sheet includes a substrate and a plurality of artificial microstructures attached to the substrate. Each substrate is virtually divided into multiple of substrate units arranged into an array. A pair of artificial microstructures is attached to each substrate. The pair of artificial microstructures includes a first artificial microstructure and a second artificial microstructure with different shapes. The dielectric constant of artificial electromagnetic materials gradually increases from zero in a certain frequency range, therefore the material has a low dielectric constant in the certain frequency range and can meet some needs of special situation. | 06-20-2013 |
| 20140028531 | SYSTEMS AND METHODS FOR MITIGATING DISTURBANCES IN A DUAL GRIDDED REFLECTOR ANTENNA - Methods and systems for mitigating disturbances in a dual gridded reflector antenna are provided. An antenna system that includes a first reflective surface, a second reflective surface, and an intercostal ring is provided. The intercostal ring is configured to connect the first reflective surface and the second reflective surface. A baffle is disposed between the intercostal ring and a path of the electromagnetic waves. The baffle is configured to redirect the electromagnetic waves away from the intercostal ring. Alternatively, the baffle is not present, and the intercostal ring is configured to redirect a perturbed portion of an electromagnetic wave away from wave paths of electromagnetic waves reflected by the first reflective surface and the second reflective surface, respectively. | 01-30-2014 |
| 20140218264 | ROTMAN LENS - A Rotman lens, having a ground plane | 08-07-2014 |
| 20150054713 | ELECTROMAGNETIC BAND GAP ELEMENT, ELECTRONIC CIRCUIT,AND CONDUCTOR STRUCTURE - An electromagnetic band gap element is provided. In the electromagnetic band gap element, a first planar conductor and a second planar conductor are respectively formed on a first plane and a second plane which are parallel to each other, and a first linear conductor is formed on at least one third plane that is parallel to the first plane and the second plane and is located between the first plane and the second plane. The first planar conductor and the second planar conductor are connected via the first linear conductor. | 02-26-2015 |
| 20150070244 | ANTENNA FOCUSING RING - The antenna focusing ring disclosed herein is configured for use with any given subscriber module (antenna). The antenna focusing ring may also be used to focus and concentrate the electromagnetic signal generated by the subscriber module onto a parabolic reflector antenna used in the transmission of data over wireless transmission systems. The antenna focusing ring described herein is used to increase signal gain in the wireless data transmission system by focusing and thereby correcting the poor illumination of an internal patch antenna within the given subscriber module. | 03-12-2015 |
| 20150070245 | COIL-BASED ARTIFICIAL ATOM FOR METAMATERIALS, METAMATERIAL COMPRISING THE ARTIFICIAL ATOM, AND DEVICE COMPRISING THE METAMATERIAL - Provided are an artificial atom of a metamaterial by coiling up space, a metamaterial including the artificial element, and a device including the metamaterial. The artificial atom of the metamaterial by coiling up space includes a first coiling unit that coils up a first space and a second coiling unit that coils up a second space and that is connected with the first coiling unit. | 03-12-2015 |
| 20150116187 | METAMATERIALS FOR SURFACES AND WAVEGUIDES - Complementary metamaterial elements provide an effective permittivity and/or permeability for surface structures and/or waveguide structures. The complementary metamaterial resonant elements may include Babinet complements of “split ring resonator” (SRR) and “electric LC” (ELC) metamaterial elements. In some approaches, the complementary metamaterial elements are embedded in the bounding surfaces of planar waveguides, e.g. to implement waveguide based gradient index lenses for beam steering/focusing devices, antenna array feed structures, etc. | 04-30-2015 |
| 20150333410 | PHASE CONVERSION DEVICE FOR ELECTROMAGNETIC WAVE - A phase conversion device, which converts an electromagnetic wave into a right-handed circularly polarized wave and a left-handed circularly polarized wave to attenuate electric and magnetic effects, includes first, second, and third layers. The first layer includes a ½ lambda wavelength plate. The second layer includes a ¼ lambda wavelength plate. The third layer includes a ½ lambda wavelength plate. The device is effective to reduce an influence of the electromagnetic wave on an electric field and a magnetic field. The device may be portable and useable to reduce an influence of electromagnetic waves on a human body. | 11-19-2015 |
| 20160036132 | ANISOTROPIC METAMATERIALS FOR ELECTROMAGNETIC COMPATIBILITY - Embodiments of the invention are directed to a device having one or more electromagnetic components embedded in an anisotropic metamaterial (AM) comprising an array of asymmetric unit cells comprising a substrate forming a plurality of channels or spaces having at least one material with different electromagnetic properties included in the channels or spaces in the first material forming an anisotropic metamaterial. | 02-04-2016 |
| 20160079679 | NON-FEEDING RERADIATING REPEATER AND METHOD FOR MANUFACTURING OF THE SAME - Disclosed are a non-feeding re-radiating repeater and a method for manufacturing the same. The repeater includes: a dielectric substrate having a flat plate shape or a curved shape; and one or more unit cells formed on the dielectric substrate, in which each of the unit cells includes an arrangement of a plurality of conductor patterns. When electromagnetic waves incident from a first direction, the unit cells may re-radiate the electromagnetic waves in a second direction which is different from the first direction. | 03-17-2016 |
| 20160156108 | MEANDER LINE CIRCULAR POLARISER | 06-02-2016 |
| 343910000 | Zoned type | 1 |
| 20100271284 | Electromagnetic compression apparatus, methods, and systems - Apparatus, methods, and systems provide electromagnetic compression. In some approaches the electromagnetic compression is achieved with metamaterials. In some approaches the electromagnetic compression defines an electromagnetic distance between first and second locations substantially greater than a physical distance between the first and second locations, and the first and second locations may be occupied by first and second structures (such as antennas) having an inter-structure coupling (such as a near-field coupling) that is a function of the electromagnetic distance. In some approaches the electromagnetic compression reduces the spatial extent of an antenna near field. | 10-28-2010 |
| 343911000 | Dielectric type | 23 |
| 20080224947 | Reconfigurable Frequency Selective Surfaces For Remote Sensing of Chemical and Biological Agents - An improved frequency selective surface (FSS) comprises a periodically replicated unit cell, the unit cell including a material having a first electrical conductivity in the presence of an external condition, and a second electrical conductivity in the absence of an external condition, or in the presence of a modified external condition. For example, the material may be a chemoresistive material, having an electrical conductivity that changes in the presence of a chemical or biological analyte, i.e. having a first value of electrical conductivity in the presence of the analyte, and a second value of electrical conductivity in the absence of the analyte. | 09-18-2008 |
| 20080238810 | Radio Frequency Lens and Method of Suppressing Side-Lobes - An RF lens according to the present invention embodiments collimates an RF beam by refracting the beam into a beam profile that is diffraction-limited. The lens is constructed of a lightweight mechanical arrangement of two or more materials, where the materials are arranged to form a photonic crystal structure (e.g., a series of holes defined within a parent material). The lens includes impedance matching layers, while an absorptive or apodizing mask is applied to the lens to create a specific energy profile across the lens. The impedance matching layers and apodizing mask similarly include a photonic crystal structure. The energy profile function across the lens aperture is continuous, while the derivatives of the energy distribution function are similarly continuous. This lens arrangement produces a substantial reduction in the amount of energy that is transmitted in the side-lobes of an RF system. | 10-02-2008 |
| 20080238811 | Method and Apparatus for Steering Radio Frequency Beams Utilizing Photonic Crystal Structures - An RF beam steering device according to present invention embodiments employs a prism assembly to steer an RF beam. The prism assembly includes a plurality of dielectric prisms each with an associated impedance matching layer. The dielectric prisms are rotated relative to each other to steer the RF beam. The prisms include a plurality of individual panels with drilled or slotted openings that are arranged to create a periodic photonic crystal structure within a defined region. This configuration effectively alters the dielectric constant over any one particular region of a panel, thereby altering the level of diffraction possible for a specified panel thickness. The openings within each stacked panel are overlapped to produce the required level of diffraction and refractive index gradient. Motors rotate the prisms relative to each other to the correct orientation for steering the RF beam in a desired manner. | 10-02-2008 |
| 20080291117 | Metamaterial Having the Capability of Broadband Left-Hand Guidance of Electromagnetic Waves - A metamaterial having a negative refractive index is presented, which has a dielectric carrier material ( | 11-27-2008 |
| 20090033586 | NEGATIVE PEMEABILITY OR NEGATIVE PERMITTIVITY META MATERIAL AND SURFACE WAVE WAVEGUIDE - Each of unit cells constituting a negative permeability medium includes a metal patch formed on a surface of a dielectric substrate. The dielectric substrate has a rear surface having a ground conductor formed on its entire surface. A positive permeability medium is an existing micro strip line and each of unit cells has a two-dimensional structure having a metal strip connected in four directions. The dielectric substrate has a rear surface having a ground conductor formed on its entire surface. The negative permeability medium is arranged at the left side adjacent to the positive permeability medium formed by unit cells arranged at the right side so that the media oppose to each other. A waveguide formed by the positive/negative permittivity medium or the positive/negative permeability medium of the meta material for propagation of a surface wave is formed at the boundary of the two media. | 02-05-2009 |
| 20090040131 | Dielectric and magnetic particles based metamaterials - RF-optical metamaterials with (±ε, ±μ) figures-of-merit of interest are constructed from coupled magnetic and dielectric multi-resonant multi-disks (finite-size cylinders) or multi-sphere lattices arranged in a periodic or a random fashion to offer tailored magnetic and electric dipole moments. The present metamaterials include embedded particles arrays that provide coupled magnetic and electronic modes equivalent to L (inductor) and C (capacitor) circuit models. Novel arrangements of these dipole modes (L and C) tailor the transfer function to the physics of interest. | 02-12-2009 |
| 20090040132 | Anisotropic metal-dielectric metamaterials for broadband all-angle negative refraction and superlens imaging - A metamaterial comprises a plurality of metallic nanowires embedded in a dielectric matrix. The metamaterial composite media provide broadband all-angle negative refraction and flat lens, superlens and curved hyperlens imaging in specific spectral regions over a wide range of frequencies including, for example, from deep infrared to ultraviolet frequencies. | 02-12-2009 |
| 20090128446 | Single-Layer Metallization and Via-Less Metamaterial Structures - Techniques and apparatus based on metamaterial structures provided for antenna and transmission line devices, including single-layer metallization and via-less metamaterial structures. | 05-21-2009 |
| 20090135088 | Refractive boundary elements, devices, and materials - An optical device includes an interface between two or more media. The refractive indices, orientations of media, and alignment relative to a propagating wave define a refractive boundary at which reflections may be reduced or eliminated, and at which, for certain incident angles, rays may be refracted on the same side of the normal as the incident ray. | 05-28-2009 |
| 20090251385 | Single-Feed Multi-Cell Metamaterial Antenna Devices - Designs and techniques of Composite Right-Left Handed (CRLH) Metamaterial (MTM) antenna devices, including a CRLH MTM devices that include MTM cells formed on a substrate and a conductive launch stub formed on the substrate to be adjacent to each of the MTM cells and electromagnetically coupled to each of the MTM cells. | 10-08-2009 |
| 20100019988 | FREQUENCY SELECTIVE SURFACE STRUCTURE FOR FILTERING OF SINGLE FREQUENCY BAND - There is provided provided a frequency selective surface (FSS) structure for filtering a single frequency band, including: a plurality of unit cells arranged at a predetermined distance, wherein each of the unit cells includes: a substrate; a circular loop formed on the substrate with a predetermined width and having at least one of meanderingly bent portions, wherein a filtering frequency band is controlled by a length of the circular loop, a width of the circular loop, a distance between the unit cells, and a thickness and dielectric constant of dielectric. | 01-28-2010 |
| 20100026607 | ELECTROMAGNETIC LENS ANTENNA DEVICE FOR BISTATIC RADAR - An electromagnetic lens device includes an electromagnetic lens for transmission, an electromagnetic lens for reception, two primary radiators each located at a focal point of one of the electromagnetic lenses, an arm holding the primary radiators, and a table. The arm is rotatable about a first axis that extends through the centers of the electromagnetic lenses. The table is rotatable about a second axis that is perpendicular to the first axis. The primary radiators rotate about the first axis together with the arm, and rotate about the second axis together with the table. | 02-04-2010 |
| 20100066639 | PLANAR GRADIENT-INDEX ARTIFICIAL DIELECTRIC LENS AND METHOD FOR MANUFACTURE - A gradient index lens for electromagnetic radiation includes a dielectric substrate, a plurality of conducting patches supported by the dielectric substrate, the conducting patches preferably being generally square shaped and having an edge length, the edge length of the conducting patches varying with position on the dielectric substrate so as to provide a gradient index for the electromagnetic radiation. Examples include gradient index lenses for millimeter wave radiation, and use with antenna systems. | 03-18-2010 |
| 20100156754 | Dielectric loaded antenna having hollow portion therein - A dielectric block disposed on a substrate so as to cover a radiation patch formed on the substrate has a cylindrical outer shape. A concave portion is provided in a bottom surface (referred to as an opposing bottom surface) of the dielectric block on the side attached to the substrate. Directivity of a dielectric loaded antenna is adjusted by the size of a hollow section formed by the concave portion being adjusted. As a result, desired directivity in a desired frequency band can be actualized without an outer size of the dielectric block (and, thus, an antenna opening size) being changed. In addition, a material (dielectric constant) of the dielectric block can be arbitrarily selected, regardless of the outer shape (size) of the dielectric block. Therefore, freedom of design can be enhanced. | 06-24-2010 |
| 20120146882 | RADAR SENSOR FOR MOTOR VEHICLES - A radar sensor for motor vehicles, having a source of radar radiation and a lens, which is situated in front of the source, is made of a material that refracts radar radiation and has a convex surface on at least one side, wherein the convex surface has a greater curvature in elevation than in azimuth. | 06-14-2012 |
| 20130088408 | TRANSPARENT FILM FOR REDUCING ELECTROMAGNETIC WAVES AND METHOD OF MANUFACTURING THE SAME - A method of manufacturing a transparent film for reducing electromagnetic waves includes forming a first dielectric layer and forming a pattern layer on the first dielectric layer. The pattern layer is made of a transparent electrode material having surface resistance. | 04-11-2013 |
| 20130271348 | DIELECTRIC LENS CONE RADIATOR SUB-REFLECTOR ASSEMBLY - A dielectric cone radiator sub-reflector assembly for a reflector antenna with a waveguide supported sub-reflector is provided as a unitary dielectric block with a sub-reflector at a distal end. A waveguide transition portion of the dielectric block is dimensioned for insertion coupling into an end of the waveguide. A dielectric radiator portion is provided between the waveguide transition portion and a sub-reflector support portion. An outer diameter of the dielectric radiator portion is provided with a plurality of radially inward grooves extending radially inward to a diameter less than an inner diameter of the end of the waveguide and a lens bore extends from a proximal end of the dielectric block towards the distal end of the dielectric block at least to the sub-reflector support portion. The unitary dielectric block may be manufactured as a single contiguous monolithic portion of dielectric material via injection molding. | 10-17-2013 |
| 20140218265 | METAMATERIAL STRUCTURE AND THE METHOD OF MANUFACTURING THE SAME - A metamaterial structure and method of manufacturing the same are disclosed. The metamaterial includes a substrate, a first resonance unit and a second resonance unit. The surface of the substrate has a bump. The first resonance unit and the second resonance unit are disposed on an adhesive direction from the bump, whereby forming the sterical resonance unit, which is able to increase the coupling efficiency of incident light in some specific frequency and form an in-situ reconfigurable metamaterial. | 08-07-2014 |
| 20140266977 | POLARIZATION CONVERTING DIELECTRIC PLATE - A dielectric plate for use with a source of electromagnetic radiation of a predetermined frequency propagating along a propagation path is provided. The dielectric plate may include alternating elongate parallel first and second dielectric elements and a frame supporting the first and second dielectric elements distributed in a first plane. The electromagnetic radiation may be predominantly linearly polarized parallel to the first plane. The first plane of the dielectric plate may transverse to the second plane and the propagation path may pass through the dielectric plate when the dielectric plate is supported in the propagation path of the electromagnetic radiation. The first and second dielectric elements may have different dielectric constants and respective thicknesses along the propagation path so that the electromagnetic radiation that passes through the first dielectric elements may be phase shifted by a predetermined amount from the electromagnetic radiation that passes through the second dielectric elements. | 09-18-2014 |
| 20150084835 | SPHERICAL RESONATOR FREQUENCY SELECTIVE SURFACE - A frequency selective surface includes resonators ( | 03-26-2015 |
| 20160111781 | SYSTEM FOR GENERATION AND MANAGEMENT OF ORBITAL ANGULAR MOMENTUM IN AN ELECTROMAGNETIC RADIATION BY MEANS OF SPECIAL LENS - The electromagnetic radiation carries both energy and angular momentum. The angular momentum can be divided into the components “Spin Angular Momentum” (i.e. the polarization) and “Orbital Angular Momentum” (OAM). The use of radiation with OAM can allow a more efficient utilization of the radio spectrum for example by means of the re-use of the same radiation frequency with different OAM modes. The present invention concerns the definition of devices, systems and methods for the generation of OAM modes in the radiation. For this purpose it has been proposed the use of one or more lenses which have a suitable distribution of refraction properties in order to generate OAM in the radiation which passes through them. The proposed lens can be composed of standard dielectric materials or of metamaterials with predetermined physical characteristics or also of tunable metamaterials for an appropriate modulation of the lens properties. | 04-21-2016 |
| 20220140493 | ISOTROPIC 3D-PRINTED GRADIENT-INDEX RF LENS - Inhomogeneous dielectric lenses for electromagnetic waves can be produced by a process such as 3D printing to have controllable dielectric values. Dielectric values can be produced by a varying density of air voids within, for example, a dielectric matrix to obtain an effective overall density. Approaches in accordance with various embodiments can obtain uniform, isotropic dielectric properties without resonant behavior by the use of aperiodic distributions of nonuniformly-sized air voids. Target air fraction and distribution of air voids can be specified by a target dielectric constant through dielectric mixing rules, such as Maxwell-Garnet mixing rules, and a requirement for locally uniform distributions of air voids, while varying the density of the air voids across the overall structure to produce a desired gradient of dielectric properties. | 05-05-2022 |
| 20090207095 | Radio Wave Lens Antenna Apparatus - In a radio wave lens antenna, a lens cover for covering the surface of the lens is stably fixed to the reflector. The antenna has a semispherical Luneberg lens, a semispherical shell-shaped lens cover for covering the surface of the lens, a radio wave reflector, a ring-shaped plate placed along the outer circumference of the lens, a primary feed placed at the focal point of the lens, and a holding part for the primary feed. A flange provided at the opening edge of the lens cover is clamped by the reflector and the plate to fix the lens cover to the reflector, and more preferably, the lens cover is caused to be in contact with the lens, and the lens is pressed also in the radial direction by the plate via the lens cover. | 08-20-2009 |
| 343911000 | Luneberg type | 1 |
| 20080224947 | Reconfigurable Frequency Selective Surfaces For Remote Sensing of Chemical and Biological Agents - An improved frequency selective surface (FSS) comprises a periodically replicated unit cell, the unit cell including a material having a first electrical conductivity in the presence of an external condition, and a second electrical conductivity in the absence of an external condition, or in the presence of a modified external condition. For example, the material may be a chemoresistive material, having an electrical conductivity that changes in the presence of a chemical or biological analyte, i.e. having a first value of electrical conductivity in the presence of the analyte, and a second value of electrical conductivity in the absence of the analyte. | 09-18-2008 |
| 20080238810 | Radio Frequency Lens and Method of Suppressing Side-Lobes - An RF lens according to the present invention embodiments collimates an RF beam by refracting the beam into a beam profile that is diffraction-limited. The lens is constructed of a lightweight mechanical arrangement of two or more materials, where the materials are arranged to form a photonic crystal structure (e.g., a series of holes defined within a parent material). The lens includes impedance matching layers, while an absorptive or apodizing mask is applied to the lens to create a specific energy profile across the lens. The impedance matching layers and apodizing mask similarly include a photonic crystal structure. The energy profile function across the lens aperture is continuous, while the derivatives of the energy distribution function are similarly continuous. This lens arrangement produces a substantial reduction in the amount of energy that is transmitted in the side-lobes of an RF system. | 10-02-2008 |
| 20080238811 | Method and Apparatus for Steering Radio Frequency Beams Utilizing Photonic Crystal Structures - An RF beam steering device according to present invention embodiments employs a prism assembly to steer an RF beam. The prism assembly includes a plurality of dielectric prisms each with an associated impedance matching layer. The dielectric prisms are rotated relative to each other to steer the RF beam. The prisms include a plurality of individual panels with drilled or slotted openings that are arranged to create a periodic photonic crystal structure within a defined region. This configuration effectively alters the dielectric constant over any one particular region of a panel, thereby altering the level of diffraction possible for a specified panel thickness. The openings within each stacked panel are overlapped to produce the required level of diffraction and refractive index gradient. Motors rotate the prisms relative to each other to the correct orientation for steering the RF beam in a desired manner. | 10-02-2008 |
| 20080291117 | Metamaterial Having the Capability of Broadband Left-Hand Guidance of Electromagnetic Waves - A metamaterial having a negative refractive index is presented, which has a dielectric carrier material ( | 11-27-2008 |
| 20090033586 | NEGATIVE PEMEABILITY OR NEGATIVE PERMITTIVITY META MATERIAL AND SURFACE WAVE WAVEGUIDE - Each of unit cells constituting a negative permeability medium includes a metal patch formed on a surface of a dielectric substrate. The dielectric substrate has a rear surface having a ground conductor formed on its entire surface. A positive permeability medium is an existing micro strip line and each of unit cells has a two-dimensional structure having a metal strip connected in four directions. The dielectric substrate has a rear surface having a ground conductor formed on its entire surface. The negative permeability medium is arranged at the left side adjacent to the positive permeability medium formed by unit cells arranged at the right side so that the media oppose to each other. A waveguide formed by the positive/negative permittivity medium or the positive/negative permeability medium of the meta material for propagation of a surface wave is formed at the boundary of the two media. | 02-05-2009 |
| 20090040131 | Dielectric and magnetic particles based metamaterials - RF-optical metamaterials with (±ε, ±μ) figures-of-merit of interest are constructed from coupled magnetic and dielectric multi-resonant multi-disks (finite-size cylinders) or multi-sphere lattices arranged in a periodic or a random fashion to offer tailored magnetic and electric dipole moments. The present metamaterials include embedded particles arrays that provide coupled magnetic and electronic modes equivalent to L (inductor) and C (capacitor) circuit models. Novel arrangements of these dipole modes (L and C) tailor the transfer function to the physics of interest. | 02-12-2009 |
| 20090040132 | Anisotropic metal-dielectric metamaterials for broadband all-angle negative refraction and superlens imaging - A metamaterial comprises a plurality of metallic nanowires embedded in a dielectric matrix. The metamaterial composite media provide broadband all-angle negative refraction and flat lens, superlens and curved hyperlens imaging in specific spectral regions over a wide range of frequencies including, for example, from deep infrared to ultraviolet frequencies. | 02-12-2009 |
| 20090128446 | Single-Layer Metallization and Via-Less Metamaterial Structures - Techniques and apparatus based on metamaterial structures provided for antenna and transmission line devices, including single-layer metallization and via-less metamaterial structures. | 05-21-2009 |
| 20090135088 | Refractive boundary elements, devices, and materials - An optical device includes an interface between two or more media. The refractive indices, orientations of media, and alignment relative to a propagating wave define a refractive boundary at which reflections may be reduced or eliminated, and at which, for certain incident angles, rays may be refracted on the same side of the normal as the incident ray. | 05-28-2009 |
| 20090251385 | Single-Feed Multi-Cell Metamaterial Antenna Devices - Designs and techniques of Composite Right-Left Handed (CRLH) Metamaterial (MTM) antenna devices, including a CRLH MTM devices that include MTM cells formed on a substrate and a conductive launch stub formed on the substrate to be adjacent to each of the MTM cells and electromagnetically coupled to each of the MTM cells. | 10-08-2009 |
| 20100019988 | FREQUENCY SELECTIVE SURFACE STRUCTURE FOR FILTERING OF SINGLE FREQUENCY BAND - There is provided provided a frequency selective surface (FSS) structure for filtering a single frequency band, including: a plurality of unit cells arranged at a predetermined distance, wherein each of the unit cells includes: a substrate; a circular loop formed on the substrate with a predetermined width and having at least one of meanderingly bent portions, wherein a filtering frequency band is controlled by a length of the circular loop, a width of the circular loop, a distance between the unit cells, and a thickness and dielectric constant of dielectric. | 01-28-2010 |
| 20100026607 | ELECTROMAGNETIC LENS ANTENNA DEVICE FOR BISTATIC RADAR - An electromagnetic lens device includes an electromagnetic lens for transmission, an electromagnetic lens for reception, two primary radiators each located at a focal point of one of the electromagnetic lenses, an arm holding the primary radiators, and a table. The arm is rotatable about a first axis that extends through the centers of the electromagnetic lenses. The table is rotatable about a second axis that is perpendicular to the first axis. The primary radiators rotate about the first axis together with the arm, and rotate about the second axis together with the table. | 02-04-2010 |
| 20100066639 | PLANAR GRADIENT-INDEX ARTIFICIAL DIELECTRIC LENS AND METHOD FOR MANUFACTURE - A gradient index lens for electromagnetic radiation includes a dielectric substrate, a plurality of conducting patches supported by the dielectric substrate, the conducting patches preferably being generally square shaped and having an edge length, the edge length of the conducting patches varying with position on the dielectric substrate so as to provide a gradient index for the electromagnetic radiation. Examples include gradient index lenses for millimeter wave radiation, and use with antenna systems. | 03-18-2010 |
| 20100156754 | Dielectric loaded antenna having hollow portion therein - A dielectric block disposed on a substrate so as to cover a radiation patch formed on the substrate has a cylindrical outer shape. A concave portion is provided in a bottom surface (referred to as an opposing bottom surface) of the dielectric block on the side attached to the substrate. Directivity of a dielectric loaded antenna is adjusted by the size of a hollow section formed by the concave portion being adjusted. As a result, desired directivity in a desired frequency band can be actualized without an outer size of the dielectric block (and, thus, an antenna opening size) being changed. In addition, a material (dielectric constant) of the dielectric block can be arbitrarily selected, regardless of the outer shape (size) of the dielectric block. Therefore, freedom of design can be enhanced. | 06-24-2010 |
| 20120146882 | RADAR SENSOR FOR MOTOR VEHICLES - A radar sensor for motor vehicles, having a source of radar radiation and a lens, which is situated in front of the source, is made of a material that refracts radar radiation and has a convex surface on at least one side, wherein the convex surface has a greater curvature in elevation than in azimuth. | 06-14-2012 |
| 20130088408 | TRANSPARENT FILM FOR REDUCING ELECTROMAGNETIC WAVES AND METHOD OF MANUFACTURING THE SAME - A method of manufacturing a transparent film for reducing electromagnetic waves includes forming a first dielectric layer and forming a pattern layer on the first dielectric layer. The pattern layer is made of a transparent electrode material having surface resistance. | 04-11-2013 |
| 20130271348 | DIELECTRIC LENS CONE RADIATOR SUB-REFLECTOR ASSEMBLY - A dielectric cone radiator sub-reflector assembly for a reflector antenna with a waveguide supported sub-reflector is provided as a unitary dielectric block with a sub-reflector at a distal end. A waveguide transition portion of the dielectric block is dimensioned for insertion coupling into an end of the waveguide. A dielectric radiator portion is provided between the waveguide transition portion and a sub-reflector support portion. An outer diameter of the dielectric radiator portion is provided with a plurality of radially inward grooves extending radially inward to a diameter less than an inner diameter of the end of the waveguide and a lens bore extends from a proximal end of the dielectric block towards the distal end of the dielectric block at least to the sub-reflector support portion. The unitary dielectric block may be manufactured as a single contiguous monolithic portion of dielectric material via injection molding. | 10-17-2013 |
| 20140218265 | METAMATERIAL STRUCTURE AND THE METHOD OF MANUFACTURING THE SAME - A metamaterial structure and method of manufacturing the same are disclosed. The metamaterial includes a substrate, a first resonance unit and a second resonance unit. The surface of the substrate has a bump. The first resonance unit and the second resonance unit are disposed on an adhesive direction from the bump, whereby forming the sterical resonance unit, which is able to increase the coupling efficiency of incident light in some specific frequency and form an in-situ reconfigurable metamaterial. | 08-07-2014 |
| 20140266977 | POLARIZATION CONVERTING DIELECTRIC PLATE - A dielectric plate for use with a source of electromagnetic radiation of a predetermined frequency propagating along a propagation path is provided. The dielectric plate may include alternating elongate parallel first and second dielectric elements and a frame supporting the first and second dielectric elements distributed in a first plane. The electromagnetic radiation may be predominantly linearly polarized parallel to the first plane. The first plane of the dielectric plate may transverse to the second plane and the propagation path may pass through the dielectric plate when the dielectric plate is supported in the propagation path of the electromagnetic radiation. The first and second dielectric elements may have different dielectric constants and respective thicknesses along the propagation path so that the electromagnetic radiation that passes through the first dielectric elements may be phase shifted by a predetermined amount from the electromagnetic radiation that passes through the second dielectric elements. | 09-18-2014 |
| 20150084835 | SPHERICAL RESONATOR FREQUENCY SELECTIVE SURFACE - A frequency selective surface includes resonators ( | 03-26-2015 |
| 20160111781 | SYSTEM FOR GENERATION AND MANAGEMENT OF ORBITAL ANGULAR MOMENTUM IN AN ELECTROMAGNETIC RADIATION BY MEANS OF SPECIAL LENS - The electromagnetic radiation carries both energy and angular momentum. The angular momentum can be divided into the components “Spin Angular Momentum” (i.e. the polarization) and “Orbital Angular Momentum” (OAM). The use of radiation with OAM can allow a more efficient utilization of the radio spectrum for example by means of the re-use of the same radiation frequency with different OAM modes. The present invention concerns the definition of devices, systems and methods for the generation of OAM modes in the radiation. For this purpose it has been proposed the use of one or more lenses which have a suitable distribution of refraction properties in order to generate OAM in the radiation which passes through them. The proposed lens can be composed of standard dielectric materials or of metamaterials with predetermined physical characteristics or also of tunable metamaterials for an appropriate modulation of the lens properties. | 04-21-2016 |
| 20220140493 | ISOTROPIC 3D-PRINTED GRADIENT-INDEX RF LENS - Inhomogeneous dielectric lenses for electromagnetic waves can be produced by a process such as 3D printing to have controllable dielectric values. Dielectric values can be produced by a varying density of air voids within, for example, a dielectric matrix to obtain an effective overall density. Approaches in accordance with various embodiments can obtain uniform, isotropic dielectric properties without resonant behavior by the use of aperiodic distributions of nonuniformly-sized air voids. Target air fraction and distribution of air voids can be specified by a target dielectric constant through dielectric mixing rules, such as Maxwell-Garnet mixing rules, and a requirement for locally uniform distributions of air voids, while varying the density of the air voids across the overall structure to produce a desired gradient of dielectric properties. | 05-05-2022 |
| 20090207095 | Radio Wave Lens Antenna Apparatus - In a radio wave lens antenna, a lens cover for covering the surface of the lens is stably fixed to the reflector. The antenna has a semispherical Luneberg lens, a semispherical shell-shaped lens cover for covering the surface of the lens, a radio wave reflector, a ring-shaped plate placed along the outer circumference of the lens, a primary feed placed at the focal point of the lens, and a holding part for the primary feed. A flange provided at the opening edge of the lens cover is clamped by the reflector and the plate to fix the lens cover to the reflector, and more preferably, the lens cover is caused to be in contact with the lens, and the lens is pressed also in the radial direction by the plate via the lens cover. | 08-20-2009 |
