|
Match
|
Document |
Document Title |
|
|
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...
|
|
|
6995733 |
Frequency selective surface and method of manufacture
Briefly, in accordance with an embodiment of the invention, a frequency selective surface (FSS) structure and a method is provided. The FSS structure may include a first conductive plate over a...
|
|
|
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...
|
|
|
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...
|
|
|
6982676 |
Plano-convex rotman lenses, an ultra wideband array employing a hybrid long slot aperture and a quasi-optic beam former
A multiple slot antenna wherein the slots are arranged in a planar configuration and therein the antenna further comprises a plurality of plano-convex Rotman lenses disposed in a stack, each...
|
|
|
6973307 |
System and method for a GPS enabled antenna
A system and method for providing a global positioning system (GPS) enabled antenna system are provided. The GPS enabled antenna may be used, for example, on a wireless communications device such...
|
|
|
6967619 |
Low noise block
Disclosed are methods, systems, and a device that includes an output for providing at least a first signal at a first frequency and a distinct second signal at a distinct second frequency, a first...
|
|
|
6965354 |
Narrow beam antenna
A method for making an antenna and the antenna itself are described. The antenna comprises a first region having a first refractive index and a second region having a negative refractive index, the...
|
|
|
6954177 |
Microstrip antenna array with periodic filters for enhanced performance
An antenna unit formed in the shape of a hollow box comprising (a) a substrate forming the front side of the antenna unit, (b) a first microstrip antenna array formed on the substrate, (c) a second...
|
|
|
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...
|
|
|
6943742 |
Focal plane array for THz imager and associated methods
A high-frequency imaging system for the millimeter and submillimeter radiation includes a high frequency lens to image an object at its focal plane. The object emits electromagnetic radiation at a...
|
|
|
6933895 |
Narrow reactive edge treatments and method for fabrication
An electromagnetic bandgap material is electrically attached to an edge, and enables high isolation between antennas due to the attenuation of surface waves. The disclosed embodiments further...
|
|
|
6927729 |
Multisource antenna, in particular for systems with a reflector
A multisource antenna includes at least two excitation sources and for spatially channeling energy picked up/radiated by the excitation sources and providing for frequency decoupling between the...
|
|
|
6919862 |
High impedance structures for multifrequency antennas and waveguides
A multi layered high impedance structure presents a high impedance to multiple frequency signals, with a different frequency for each layer. Each layer comprises a dielectric substrate, and an...
|
|
|
6917347 |
Painted broadcast-frequency reflective component
A component that is reflective for broadcast-frequency energy includes a nonmetallic substrate having a substrate surface, and a layered coating overlying and contacting the substrate. The layered...
|
|
|
6917343 |
Broadband antennas over electronically reconfigurable artificial magnetic conductor surfaces
A low profile antenna system includes an artificial magnetic conductor comprising a frequency selective surface (FSS) having an effective sheet capacitance which is electronically variable to...
|
|
|
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...
|
|
|
6911956 |
Array antenna
Dielectric lenses ( 6 ) with an outer dimension of about 0.5 to 1.5 times a wavelength are arranged on front faces of respective slots ( 3 ) of a waveguide slot array antenna ( 1 ). The dielectric...
|
|
|
6909113 |
Three-dimensional photonic band structures in solid materials
A method of forming a periodic index of refraction pattern in a superlattice of a solid material to achieve photonic bandgap effects at desired optical wavelengths is disclosed. A plurality of...
|
|
|
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...
|
|
|
6906676 |
FSS feeding network for a multi-band compact horn
A feed structure ( 105 ) for a horn antenna ( 100 ). The feed structure can include a first waveguide ( 110 ) and a second waveguide ( 115 ) having a first portion at least partially disposed...
|
|
|
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...
|
|
|
6897831 |
Reconfigurable artificial magnetic conductor
An electronically reconfigurable artificial magnetic conductor (RAMC) includes a frequency selective surface (FSS) having an effective sheet capacitance which is variable to control resonant...
|
|
|
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...
|
|
|
6885355 |
Spatial filtering surface operative with antenna aperture for modifying aperture electric field
A spatial filtering surface includes a dielectric substrate and a plurality of spaced, geometrically configured, resonant elements positioned on the dielectric substrate. The resonant elements form...
|
|
|
6882316 |
DC inductive shorted patch antenna
A direct current (DC) inductive shorted patch antenna includes a direct current inductive (DCL) frequency selective surface (FSS) forming the radiating element, a ground plane, a feed, and a radio...
|
|
|
6879432 |
Beamsplitter utilizing a periodic dielectric structure
An optical device having a photonic crystal structure is provided. The photonic crystal structure includes a plurality of rods/holes, a plurality of light input ports, a plurality of light output...
|
|
|
6879289 |
Apparatus for providing a controllable signal delay along a transmission line
Apparatus for providing a controllable signal delay along a transmission line, which apparatus comprises a transmission line conductor on a dielectric medium comprised wholly or partially or a...
|
|
|
6870498 |
Generation of electromagnetic radiation
A system for generating electromagnetic radiation comprising a flux generator for generating a high intensity current and conversion means in the form of a reflex triode or a plasma focus device...
|
|
|
6864857 |
Optically transparent millimeter wave reflector
An optically transparent dielectric reflector ( 200 ) that reflects an incident millimeter-wave beam at a design frequency. The reflector ( 200 ) includes layers of different optically transparent...
|
|
|
6859304 |
Photonic crystals and devices having tunability and switchability
A photonic crystal having reversibly tunable photonic properties. The photonic crystal includes a phase change material having a plurality of structural states that vary with respect to fractional...
|
|
|
6847830 |
Retractable antenna for personal computer card
A device for providing wireless communication is disclosed. The device includes an antenna mounted on a personal computer card. The antenna has a pivotal connection for pivoting the antenna and a...
|
|
|
6842146 |
Plasma filter antenna system
An antenna system for receiving electromagnetic waves of predetermined frequency range is disclosed comprising an antenna configured for receiving electromagnetic waves; and a plasma filter...
|
|
|
6836258 |
Complementary dual antenna system
The present invention provides a dual antenna system where a first antenna element has a metallic surface with openings that are resonant at frequencies other than the operating frequency of a...
|
|
|
6822622 |
Electronically reconfigurable microwave lens and shutter using cascaded frequency selective surfaces and polyimide macro-electro-mechanical systems
A radio frequency reconfigurable lens is provided. In particular, a lens comprising at least two opposed frequency selective surface sheets is provided. A relative phase shift may be imparted to an...
|
|
|
6812903 |
Radio frequency aperture
A radio frequency aperture comprising a plurality of insulating layers disposed in a stack, each layer including an array of conductive regions, the conductive regions being spaced from adjacent...
|
|
|
6806843 |
Antenna system with active spatial filtering surface
A spatial filtering surface includes a dielectric substrate and a plurality of spaced, resonant dipole elements positioned on the dielectric substrate. Each dipole element has dipole ends and an...
|
|
|
6806846 |
Frequency agile material-based reflectarray antenna
A reflectarray antenna with a scanned radiated beam has an antenna feed for radiating a wave. A reflecting surface excited by the wave is reflected from a reflecting surface located on a tunable...
|
|
|
6795039 |
Antenna system and method for manufacturing the same
An antenna system is provided with an antenna panel 1 which has fine bumps and dips 4 formed on a mirror surface side, which is one of surfaces opposing to each other, by etching, wherein the...
|
|
|
6791732 |
Systems and methods for altering the propagation of optical signals within optical media
Optical modulators are provided. A representative optical modulator includes an optical medium that is adapted to propagate optical signals. An array of lattice sites are arranged in the optical...
|
|
|
6791432 |
Left handed composite media
Composite media having simultaneous negative effective permittivity and permeability over a common band of frequencies. A composite media of the invention combines media, which are either...
|
|
|
6788273 |
Radome compensation using matched negative index or refraction materials
A compensated radome is provided, comprising an inner layer of a negative index of refraction material, often referred to as a “metamaterial”, and an outer layer of a positive index of...
|
|
|
6774862 |
Multibeam antenna apparatus
A multibeam antenna apparatus is disclosed. The multibeam antenna apparatus includes a main reflector ( 1 ), a sub-reflector ( 2 ), a focused beam feeder ( 3 ), a primary radiator array ( 5 )...
|
|
|
6774861 |
Dual band hybrid offset reflector antenna system
A dual band high efficiency hybrid offset reflector antenna system ( 10 ) that includes a low frequency antenna ( 12, 16 ) including a paraboloidal main offset reflector ( 12 ) for reflecting a low...
|
|
|
6774867 |
Multi-resonant, high-impedance electromagnetic surfaces
An artificial magnetic conductor is resonant at multiple resonance frequencies. The artificial magnetic conductor is characterized by an effective media model which includes a first layer and a...
|
|
|
6774866 |
Multiband artificial magnetic conductor
A multi-band artificial magnetic conductor (AMC) is described in an electrically small antenna for use in handheld wireless devices and base station antenna applications. The multi-band AMC...
|
|
|
6768468 |
Reflecting surfaces having geometries independent of geometries of wavefronts reflected therefrom
A flat metal plate ( 20 ) has a plurality of holes ( 50 ) that have a property that changes across the surface of the plate so that the flat plate ( 20 ) mimics the behavior of a curved wavefront...
|
|
|
6768476 |
Capacitively-loaded bent-wire monopole on an artificial magnetic conductor
An antenna consisting of a thin strip bent-wire monopole disposed on an artificial magnetic conductor (AMC) is loaded at the end opposite to the feed point with a distributed or lumped capacitance...
|
|
|
6768051 |
Screens for RF magnetic flux
Microstructured materials which can be tuned to a particular range of r.f. frequencies to display particular magnetic permeabilities have been proposed. A typical material is made of an array of...
|
|
|
6759993 |
Dual polarization antenna with low side lobes
Dual polarisation antenna having low side lobes, useful in a satellite radio communication system. The antenna includes a reflector assembly ( 12 ) illuminated by a feed source ( 11 ). The...
|