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7598920 |
Input device of two orthogonal polarized-wave waveguide type, and radio wave receiving converter and antenna device using the input device
A radio wave receiving converter is provided with a circular waveguide unit to which a vertically-polarized wave and a horizontally-polarized wave are input, first and second board holding units...
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7583238 |
Radome for endfire antenna arrays
The present invention provides a radome for an endfire antenna array that includes a honeycomb core, an inner skin attached to the honeycomb core, a first set of conductive slats disposed on the...
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7564419 |
Wideband composite polarizer and antenna system
A composite polarizer including a first polarizer having a plurality of parallel metal vanes and a second polarizer having a plurality of parallel layers of dielectric material is provided. The...
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7561046 |
Radio tag reading apparatus
A reader antenna is connected to an interrogator. Conductors are arranged at two places at the opposed marginal edge portions of a radiation plane of the reader antenna along a radiation direction...
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7548217 |
Partially reflective surface antenna
A partially reflect surface antenna includes a substrate, a reflective sheet and a plurality of supporting units. The substrate has an upper surface formed thereon a signal I/O for receiving and...
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7492329 |
Composite material with chirped resonant cells
A composite material comprising a dielectric material and a plurality of non-overlapping local resonant cell groups disposed across the dielectric material is described. Each local resonant cell...
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7492324 |
Method and apparatus for receiving dual band signals from an orbital location using an outdoor unit with a concentric antenna feed
A satellite system 10 having a first satellite 14 at a first orbital slot B has a first transponder 32 and a second generating a first downlink signal 44 B at a first frequency and a second...
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7436370 |
Device and method for polarization control for a phased array antenna
A method of configuring a phased array antenna having a plurality of radiators, each said radiator elements capable of radiating or receiving signals in one of two orthogonal polarizations...
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7430397 |
Radio repeater and radio relay transmission method
A radio repeater including at least first and second relay systems, each including a reception antenna configured to receive a radio signal, a loop interference suppressor, connected to the...
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7429962 |
Millimeter-wave transreflector and system for generating a collimated coherent wavefront
A planar multi-layer transreflector for generating collimated coherent energy comprises one or more of insulating layers between two or more metallic layers. The transreflector substantially...
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7423608 |
High impedance electromagnetic surface and method
A high impedance surface ( 300 ) has a printed circuit board ( 302 ) with a first surface ( 314 ) and a second surface ( 316 ), and a continuous electrically conductive plate ( 319 ) disposed on...
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7385552 |
Real-time, cross-correlating millimeter wave imaging system using dual pill-box antennas
A method and apparatus are disclosed for forming an image from millimeter waves. A field of view scanned using two geometrically orthogonal, intersecting copolarized fan beams ( 110, 120 ) to...
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7315728 |
Polarized wave measuring apparatus, and antenna characteristic measuring apparatus and radio wave measuring apparatus using the same
A phase shift section phase-shifts the second band-restricted signal to a first phase-shifted signal and a second phase-shifted signal having a phase that is different from the phase of the first...
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7277061 |
Single aperture monopulse antenna
An antenna comprises a polarizer, a phasing network and a field radiating element such as a horn. The polarizer and phasing network generate a plurality of phase shifted circularly polarised waves...
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7256753 |
Synthesis of metamaterial ferrites for RF applications using electromagnetic bandgap structures
By configuring a high impedance frequency selective surface (HZ-FSS) structure for the appropriate values of surface impedance (surface resistance and surface reactance), a high frequency...
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7242352 |
Multi-band or wide-band antenna
A monopole-type antenna for multi- or wide-band use to transmit or receive radio frequency electromagnetic energy. A feed point, provides energy into the antenna or receives energy from the...
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7236142 |
Electromagnetic bandgap device for antenna structures
An electromagnetic bandgap device is mountable on a RF disturbing structure of an antenna to minimize signal field disturbance imparted thereby. The RF disturbing structure is oriented in a...
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7236138 |
Externally powered negatively refracting photonic bandgap medium
An electromagnetic medium is described, the electromagnetic medium comprising a periodic array patterned to provide at least one photonic bandgap and to provide negative refraction for incident...
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7212087 |
Twisted waveguide and wireless device
H plane and E plane of a second rectangular waveguide element are inclined at an angle of 45° with respect to H plane and E plane of a first rectangular waveguide element. A connection element...
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7190325 |
Dynamic frequency selective surfaces
An antenna system is disclosed. The antenna system includes at least one antenna element and an adaptable frequency-selective-surface responsive to operating characteristics of the at least one...
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7177236 |
Optical disc head including a bowtie grating antenna and slider for optical focusing, and method for making
A slider system have been developed to aid in the spacing between read/write heads and the storage medium, and a grating antenna amplifier has been developed to improve illumination spot size and...
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7176827 |
Apparatus for redirecting radiation
An apparatus for redirecting radiation including a polarization dependent reflector and an optical component able to transform the polarisation of radiation as it passes through the component....
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7170460 |
Polarized wave separator, converter for satellite broadcast reception, and antenna device for satellite broadcast reception
A polarized wave separator includes a tubular waveguide, and a partition extending in the waveguide along the longitudinal direction thereof. The end of the partition facing the longitudinal...
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7109937 |
Phased array planar antenna and a method thereof
A phased array antenna system accommodating onto a platform for tracking a target moving relatively to the platform, the antenna system comprising a first planar active subsystem operable for...
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7098859 |
Antenna unit
In a variable power divider including a first 90° phase combiner ( 30 ), a second 90° phase combiner ( 40 ), and a phase-amplitude adjustment block ( 50 ), the phase-amplitude adjustment block (...
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7071890 |
Reflector
A reflector includes a pair or plural pairs of array antennas. Each array antenna is formed of an arrangement of a plurality of antenna elements formed on a surface of a waveguide. The array...
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7071889 |
Low frequency enhanced frequency selective surface technology and applications
DC inductive FSS technology is a printed slow wave structure usable for reduced size resonators in antenna and filter applications of wireless applications. It is a dispersive surface defined in...
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7071888 |
Steerable leaky wave antenna capable of both forward and backward radiation
Leaky wave antenna beam steering that is capable of steering in a backward direction, as well as further down toward the horizon in the forward direction than was previously possible, and also...
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7053849 |
Switchable polarizer
A switchable polarizer assembly, having a coupler, a polarizer module with a plurality of apertures, each aperture adapted for a desired transition, an antenna adapter and a central waveguide with...
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7038821 |
Scanning apparatus
A scanning apparatus comprises two rotatable bodies ( 1, 10 or 40 ) arranged to rotate in opposite directions. The first body being a polarizer ( 10 ) and the second being a mirror ( 1 ) or a...
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7034774 |
Feed structure and antenna structures incorporating such feed structures
A polarizer for an antenna and antenna structures are disclosed. According to one aspect a polarizer includes a generally cylindrical sidewall portion extending between spaced apart end portions....
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6999044 |
Reflector antenna system including a phased array antenna operable in multiple modes and related methods
A reflector antenna system may include an arc-shaped antenna reflector defining a first antenna beam, and a phased array antenna positioned in the first antenna beam including first and second...
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6995628 |
Waveguide twist having quadrate sections
A waveguide unit including a vertically polarized waveguide, a horizontally polarized waveguide, and a waveguide type-polarized wave converter interposed between said waveguides. The waveguide...
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6992636 |
Dielectric substrate with selectively controlled effective permittivity and loss tangent
A substrate ( 300 ) for an RF device includes a plurality of layers ( 102 ) of dielectric material cofired in a stack. The plurality of layers ( 102 ) is formed from a material having a...
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6985118 |
Multi-band horn antenna using frequency selective surfaces
A waveguide ( 100 ) including at least one outer surface ( 105, 110, 115, 120 ) defining a waveguide cavity ( 140 ) and at least one inner surface ( 130, 135 ) positioned within the waveguide...
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6970138 |
Polarization plate
The present invention discloses a system and method by which radio transceiver equipment may be coupled to antenna equipment polarized in either of two orthogonal polarizations without requiring...
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6952190 |
Low profile slot antenna using backside fed frequency selective surface
A low profile, wide band gap antenna having a high impedance surface, the high impedance surface including a conductive plane and an array of conductive elements spaced from the conductive plane by...
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6943744 |
Waveguide diplexing and filtering device
A waveguide diplexing and filtering device for separating two polarities of one frequency band and at least one polarity of another frequency band of an electromagnetic or microwave signal. The...
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6931245 |
Downconverter for the combined reception of linear and circular polarization signals from collocated satellites
A microwave downconverter apparatus and scheme is hereby presented for the simultaneous reception of both linearly and circularly polarized signals from collocated satellites. A single antenna and...
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6914581 |
Focused wave antenna
Disclosed herein is an antenna that is integrally encompassed within a three-dimensional shaped substance that has a permittivity or permeability constant greater than one. Such an encompassed...
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6906685 |
Electromagnetic-field polarization twister
An apparatus and method to twist the field polarization of an electromagnetic wave over a desired frequency band is described. In one embodiment, a transmission twister rotates the polarization of...
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6906683 |
Circular polarized wave reception antenna
A circular polarized wave reception antenna has a monopole antenna having a pole portion and an ground plate for grounding one terminal of the pole portion and a polarization converting arrangement...
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6900763 |
Antenna system with spatial filtering surface
An antenna system includes a ground plane and/or antenna elements forming an antenna array. A spatial filtering surface is positioned adjacent the antenna array through which electromagnetic...
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6897820 |
Electromagnetic window
Ad device substantially transparent to electromagnetic radiation of a certain frequency band is presented. The device comprises at least one dielectric structure of a predetermined thickness...
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6885342 |
Antenna for transponder
Antenna for sending and receiving microwave radiation, e.g. for use in a transponder in a transponder system for wireless payment of tolls, or the like. It has an excited antenna element ( 13 )...
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6879298 |
Multi-band horn antenna using corrugations having frequency selective surfaces
An antenna ( 100 ) for microwave radiation including a first horn ( 135 ) which includes a plurality of corrugations ( 150 ). At least one of the corrugations ( 150 ) is formed of a frequency...
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6876834 |
Power inserter configuration for wireless modems
A wireless modem contains a power inserter circuit along with the traditional modem components. The power inserter circuit isolates the modem components from DC power that is inserted on the...
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6870511 |
Method and apparatus for multilayer frequency selective surfaces
A method for designing a multiple layer frequency selective surface structure. An overall response for the structure is specified. The desired response may be modeled as a filter response....
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6861999 |
Converter structure for use in universal LNB
A converter main body is formed from composite material wherein reinforcing material comprising carbon fiber is combined with plastic material comprising ABS resin in an amount that is 30 wt %...
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6859184 |
Polarized wave separating structure, radio wave receiving converter and antenna apparatus
The septum is extended through the opening to the radio wave receiving portion to separate respective polarized waves received by a pair of radio wave receiving portions, and a space between the...
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