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7355554 |
Method of producing a photonic bandgap structure on a microwave device and slot type antennas employing such a structure
The invention relates to a method of producing a photonic bandgap structure on a slot-type microwave device which is produced on a metallized substrate. According to the invention,...
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7345652 |
Antenna system and RF signal interference abatement method
Disclosed is an antenna system including a Luneberg Lens having a spherically shaped outer surface and a spherically shaped focal surface spaced from its outer surface with a plurality of patch...
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7339539 |
Photonic crystal exhibiting negative refraction without requiring a negative effective index
A periodic electromagnetic medium is disclosed that includes a surface that provides an interface with an ambient medium and a periodic structure that provides negative refraction within the medium...
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7339521 |
Analytical instruments using a pseudorandom array of sources, such as a micro-machined mass spectrometer or monochromator
Novel methods and structures are disclosed herein which employ pseudorandom sequences to spatially arrange multiple sources in a pseudorandom source array. The pseudorandom source array can replace...
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7330161 |
Antenna, radio device, method of designing antenna, and method of measuring operating frequency of antenna
An antenna comprises a first conductive layer, a second conductive layer and an LC resonance circuit. The first conductive layer has plural elements and is disposed adjacently to each other. The...
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7324064 |
Passive anti-jamming antenna system
System and method for improving the interference resistance of an radio frequency (RF) antenna system through passive prescreening of the RF energy incident upon the antenna. The invention...
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7324065 |
Antenna radiation collimator structure
An antenna radiation collimator structure is provided as including a number of resonator circuit boards oriented to form a block structure. A sheet of dielectric material is disposed between each...
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7301504 |
Mechanical scanning feed assembly for a spherical lens antenna
The invention includes a mechanical scanning feed and a spherical lens antenna system. The mechanical feed includes a waveguide, which has a movable wall assembly that contains a guide slot. The...
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7292204 |
Dielectric resonator antenna with a caved well
A dielectric resonator antenna is a dielectric resonator mounted on a feed-in/feed-out component. The dielectric resonator is a rectangular parallelepiped made of a dielectric, and has a caved well...
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7280086 |
Reflecting antenna with 3D structure for shaping wave beams belonging to different frequency bands
Multifrequency reflecting antenna (AR), for example for a telecommunication satellite that comprises a reflector (R) with a front face (FA) for reflecting beams of electromagnetic waves belonging...
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7277065 |
Tunable photonic band gap structures for microwave signals
Photonic Band Gap (PBG) structures are utilized in microwave components as filters to suppress unwanted signals because they have the ability to produce a bandstop effect at certain frequency range...
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7263760 |
Method for making a slow-wave ridge waveguide structure
A method of fabricating a ridge waveguide filter having a slow-wave structure. The ridge waveguide is formed of a conductive sidewall-from metallic materials and may be in the form of a hollow...
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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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7253788 |
Mixed-signal systems with alternating impedance electromagnetic bandgap (AI-EBG) structures for noise suppression/isolation
Alternating impedance electromagnetic bandgap (AI-EBG) structures, systems incorporating AI-EBG structures, and methods of making AI-EBG structures, are disclosed.
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7250921 |
Method and apparatus for multiband frequency distributed circuit with FSS
A method and apparatus for a multiband frequency distributed circuit apparatus with FSS. The apparatus includes a circuit, a first dielectric layer, a first FSS layer, a second layer and a ground...
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7245269 |
Adaptive beam forming antenna system using a tunable impedance surface
A method of and apparatus for beam steering. A feed horn is arranged so that the feed horn illuminates a tunable impedance surface comprising a plurality of individually tunable resonator cells,...
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7242368 |
Multibeam antenna with photonic bandgap material
A multibeam antenna includes: a photonic bandgap material ( 20 ) having at least one band gap; at least one periodicity defect so as to produce at least one narrow bandwidth inside the at least one...
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7239291 |
Multi-band antenna
Antenna assemblies and corresponding modes of operation are provided where the first antenna assembly of the system is tuned to a first frequency band ν 1 and the second antenna assembly of 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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7227501 |
Compensating structures and reflector antenna systems employing the same
A compensating structure includes layers of non-uniform arrays of conductive patches configured to provide phase and/or amplitude distribution modification of feed primary patterns.
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7218281 |
Artificial impedance structure
A method for guiding waves over objects, a method for improving a performance of an antenna, and a method for improving a performance of a radar are disclosed. The methods disclosed teach how an...
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7215301 |
Electromagnetic bandgap structure for isolation in mixed-signal systems
Electromagnetic bandgap (EBG) structures, systems incorporating EBG structures, and methods of making EBG structures, are disclosed. An embodiment of the structure, among others, includes a...
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7209082 |
Method and apparatus for a dual band gap wideband interference suppression
A method and apparatus including, in some embodiments, a first conductor plane, a first array of periodically distributed co-planar conductive patches, each patch in the first array being connected...
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7205941 |
Composite material with powered resonant cells
A composite material and related methods are described, the composite material being configured to exhibit a negative effective permittivity and/or a negative effective permeability for incident...
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7190315 |
Frequency selective surface to suppress surface currents
Briefly, in accordance with an embodiment of the invention, an apparatus to suppress surface currents is provided. The apparatus may include very high frequency (VHF) antenna and a frequency...
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7190324 |
Low-profile lens antenna
This invention relates to a low-profile lens antenna. In particular, this invention relates to a low-profile lens antenna for use in a depression in a surface, e.g. a concavity in the ground. A...
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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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7190326 |
Conductive frequency selective surface utilizing arc and line elements
An electrically conductive coating of an automotive heatable windshield has a communication window having an enhanced frequency selective surface having arranged passing areas (uncoated areas) and...
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7180468 |
Object detecting device
To provide an object detecting device having a capability of sufficiently adjusting the detection areas to suit to the environment in which it is installed, the object detecting device includes an...
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7180473 |
Antenna with built-in filter
At least one filter block ( 25, 35, 45 ) is formed in a thin and flat dielectric multilayer structure ( 21 ) and fixed with radiation elements ( 2, 3 ). Each filter block includes at least one of a...
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7173565 |
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...
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7173577 |
Frequency selective surfaces and phased array antennas using fluidic dielectrics
A phased array antenna ( 100 ) having a frequency selective surface comprises a substrate ( 125 ) and an array of antenna elements ( 140 ) thereon. Each antenna element comprises a medial feed...
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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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7154451 |
Large aperture rectenna based on planar lens structures
A rectenna structure comprising a flexible, dielectric sheet of material; a plurality of metallic lenslets disposed on the sheet of material; and a plurality of diodes disposed on the sheet of...
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7151506 |
Electromagnetic energy coupling mechanism with matrix architecture control
The present invention relates generally to reconfigurable, solid-state matrix arrays comprising multiple rows and columns of reconfigurable secondary mechanisms that are independently tuned....
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7151507 |
Low-loss, dual-band electromagnetic band gap electronically scanned antenna utilizing frequency selective surfaces
A dual-band electromagnetic band gap (EBG) electronically scanned antenna utilizing frequency selective surfaces (FSS) uses FSS waveguide phase shifters. Each FSS waveguide phase shifter has a...
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7145518 |
Multiple-frequency common antenna
A multiple-frequency common antenna has a first substrate sheet and a second substrate sheet respectively structured by an HIP consisting of a metal plate, small metal plates disposed in two...
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7145512 |
Reconfigurable plasma antenna with interconnected gas enclosures
A reconfigurable antenna comprises an array of interconnected gas enclosures, each of the enclosures being controllable between at least a first state in which gas within the enclosure is...
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7138958 |
Reflector antenna radome with backlobe suppressor ring and method of manufacturing
A radome adapted to reduce backlobes of an associated reflector antenna via application of a conductive ring with an inward facing edge about the periphery of the radome. The conductive ring may be...
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7136028 |
Applications of a high impedance surface
Disclosed herein are various high-impedance surfaces having high capacitance and inductance properties and methods for their manufacture. One exemplary high-impedance surface includes a plurality...
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7136029 |
Frequency selective high impedance surface
Disclosed herein are various high-impedance surfaces having high capacitance and inductance properties. One exemplary high-impedance surface includes a plurality of conductive structures arranged...
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7119755 |
Wave antenna lens system
An array of dielectric wave antennas is disclosed. Each wave antenna has a central dielectric portion and two dielectric tapered portions, disposed on opposite sides of the central dielectric...
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7095627 |
Frequency-selective shield structure and electric device having the structure
A shield structure that transmits a radio wave in a specific frequency band and that exhibits a high shield characteristic in other bands. An opening portion having a specific shape and a specific...
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7081865 |
Method and apparatus for improving antenna radiation patterns
Several electromagnetic scattering structures are designed to improve antenna radiation patterns. The electromagnetic scattering structure has a conductive layer with certain patterns, and is...
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7075388 |
Ceramic RF triplexer
A monoblock ceramic triplexer for connection to an antenna, a transmitter, a receiver and a GPS receiver is described. The triplexer includes a solid, monolithic core of dielectric material...
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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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7042419 |
High-selectivity electromagnetic bandgap device and antenna system
An antenna system includes an antenna element and an electromagnetic bandgap element proximate the antenna element wherein the electromagnetic bandgap element is optimized for narrow bandwidth...
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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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