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7411561 |
Gimbaled dragonian antenna
In one embodiment, a gimbaled reflector antenna is provided that includes: a Dragonian antenna having a sub-reflector and a main reflector; a feed; a third reflector adapted to reflect a beam from...
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7408522 |
Antenna-feeder device and antenna
An antenna comprises: a main reflector being a body of revolution of parabolic shape; a sub-reflector being a body of the revolution of elliptic shape having a circle and a vertex oriented to the...
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7394436 |
Multi-beam and multi-band antenna system for communication satellites
An antenna system includes a reflector having a modified-paraboloid shape; and a multi-beam, multi-band feed array located at a focal point of the reflector so that the antenna system forms a...
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7388559 |
Reflector antenna
An antenna provided. The antenna includes an outer dish having a first surface and a second surface; an inner dish mounted to the first surface of the outer dish; a helix feed mounted on a ground...
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7345653 |
Shaped reflector reoptimization
An invention is provided for generating a shaped reflector. The invention includes receiving required performance data that defines a desired RF performance of a shaped reflector. A mathematical...
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7286096 |
Aligned duplex antennae with high isolation
Integrating dual antennae into a single rigid assembly guarantees parallel alignment between the antennae and provides higher isolation with lower insertion loss than duplexing methods can achieve...
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7256749 |
Compact, mechanically scanned cassegrain antenna system and method
A mechanically scanned reflector antenna system that produces a compact swept diameter and overall height, which is ideally suited for use on the external surface of a high speed mobile platform...
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7242360 |
High power dual band high gain antenna system and method of making the same
A high power dual band high gain antenna system is provided. The antenna system employs one or more feedhorn clusters to distribute power associated with the transmission of high power signals. A...
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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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7205949 |
Dual reflector antenna and associated methods
An antenna system includes an antenna feed aligned with a subreflector and a main reflector. The subreflector has a concave surface defining a vertex. A main reflector having a concave surface is...
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7187340 |
Simultaneous multi-band ring focus reflector antenna-broadband feed
Compact multi-band antenna system ( 500 ) includes a main reflector ( 502 ) having a shaped surface of revolution about a boresight axis of the antenna operable at a plurality of frequency bands...
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7161549 |
Single-aperture antenna system for producing multiple beams
A novel single-aperture antenna system for producing multiple closely spaced or overlapping beams. The antenna system has multiple feeds for radiating energy, and a hyperboloidal or ellipsoidal...
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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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7138953 |
Method and apparatus for reducing the effects of collector blockage in a reflector antenna
A method of reducing blockage in a reflector antenna includes disposing a feed mechanism in front of a first reflector and disposing a second reflector in front of the feed mechanism. The second...
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7129903 |
Method and apparatus for mounting a rotating reflector antenna to minimize swept arc
An apparatus and method for forming a cassegrain reflector antenna that allows an extended length feed horn to be employed without increasing an overall depth of the antenna. This enables the swept...
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7091922 |
Laser alignment apparatus and method
A method for aligning a feed horn in an antenna system ( 100 ) is disclosed. The antenna system ( 100 ) includes at least one reflector surface and one or more feed horns ( 141, 142, . . . 145 )....
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7081862 |
Integrated active satellite antenna module
An integrated active satellite antenna module has a low loss filter, a low noise amplifier, a switch, a chip, two input ends and an output end. A front-end microwave circuit is used for resolving...
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7042410 |
Microwave antenna feed with integral bandpass filter
An antenna feed with an integrated bandpass filter is disclosed. The antenna feed contains a reflector and a dipole antenna. A bandpass filter comprising one or more bandpass filter elements is...
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7038632 |
Co-located multi-band antenna
A multi-band reflector antenna having a main reflector, a sub reflector, a first feed and a second feed. The first feed, the sub reflector and the main reflector positioned in a Gregorian optic...
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7023394 |
Cassegrain-type feed for an antenna
A cassegrain-type feed for a parabolic antenna is a dual-band feed and employs a waveguide feeding a dielectric cone feeding a subreflector. The waveguide has an end-portion adjacent a narrow end...
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7015867 |
Illuminating reflector with low-gain propagator
An illuminating-reflector system is provided for transmitting a frequency band in an dispersed beam and a substantially collimated beam. The system includes a secondary reflector configured to...
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7009574 |
Plural-reflector antenna system
In order to lessen the deterioration of the VSWR, a plural-reflector antenna system is provided wherein an appropriately shaped vertex matching plate is disposed on the subreflector and electric...
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7006049 |
Dual reflector system and method for synthesizing same
In one embodiment of the present invention, an offset folded reflector pair is optimized for scanning off boresight by enforcing the Abbe Sine condition using a least-error approximation. Coma and...
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6987489 |
Electronically scanning direction finding antenna system
An electronic scanning radio direction finding system for accurate direction finding of radio frequency signals using singly or doubly flared cylindrical reflectors surrounded by a circular array...
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6985120 |
Reflector antenna with injection molded feed assembly
A reflector antenna with a self supported feed assembly that may be formed by injection molding. A waveguide portion of the feed assembly has a dielectric cone at a distal end that supports and...
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6982679 |
Coaxial horn antenna system
An antenna feed system includes a plurality of RF horn antennas ( 201, 202 ) for operating on a plurality of RF frequency bands. A first one of the feed horns ( 202 ) can have a boresight axis and...
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6980170 |
Co-located antenna design
A method and apparatus are provided for transceiving signals. The method includes the steps of providing a secondary reflector within a focal region of a main reflector in a relative spatial...
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6977622 |
Shaped-reflector multibeam antennas
A method, an apparatus, and a computer program product for electromagnetically designing a shaped-reflector multibeam antenna ( 100 ) are disclosed. An initial configuration of the multibeam...
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6965351 |
Dual-frequency-illuminating reflector
An illuminating reflector system is provided for transmitting first and second frequency bands for satellite and terrestrial communications. The illuminating reflector includes a first reflector...
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6940464 |
Reflector and antenna system containing reflectors
The invention concerns a reflector and a satellite antenna system comprising such a reflector. In the satellite antenna system, microwave radiation from one or more feed horns ( 5 ) is emitted at...
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6937201 |
Multi-band coaxial ring-focus antenna with co-located subreflectors
A multi-band ring focus antenna system includes a main reflector ( 408 ) that is operable at a plurality spectrally offset frequency bands. A first feed ( 301, 403 ) includes a first feed horn (...
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6933904 |
Antenna apparatus
An antenna apparatus detects a reflected light from a scattered light or from a reflector ( 40 ) mounted in an optical fiber ( 6,6 a -6 d ), measures a strain generated in a primary reflecting...
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6914575 |
Selectable reflector and sub-reflector system using fluidic dielectrics
A selectable sub-reflector antenna system ( 100 ) comprises a main reflector unit ( 101 ), a sub-reflector unit ( 111 ) disposed apart from the main reflector unit and having at least one cavity (...
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6911953 |
Multi-band ring focus antenna system with co-located main reflectors
A compact multi-band ring-focus antenna system. The antenna system includes a first and a second main reflector 304, 306, each having a shaped surface of revolution about a common boresight axis...
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6882323 |
Multi-beam antenna system with shaped reflector for generating flat beams
A side-fed dual reflector antenna system ( 10 ) of the present invention overcomes the size cost and complexity limitations associated with conventional single and multiple reflector antenna...
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6870512 |
Antenna device for conducting two-axial scanning of an azimuth and elevation
For the purpose of obtaining a mechanical drive reflecting mirror antenna device which is downsized and low in attitude, enables wide-angle scanning, and is high in performance, there are provided...
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6861998 |
Transmission/reception sources of electromagnetic waves for multireflector antenna
The present invention relates to an electromagnetic wave transmission/reception source for a multireflector antenna of the Cassegrain type comprising longitudinal-radiation means operating in a...
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6859188 |
Rotationally configurable offset reflector antenna
An antenna system particularly suitable for use with a satellite in a terrestrial communication system includes first and second signal reflectors which are selectively positionable with respect to...
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6836255 |
Limited field of view antenna for space borne applications
A hybrid parabolic reflector phased array antenna system which is stowable in a space vehicle and is deployable in space. The antenna includes a large torus which acts as a support structure for a...
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6833819 |
Beam steering apparatus for a traveling wave antenna and associated method
Steering of an electromagnetic beam of energy in the upper plate of a plate waveguide of a traveling wave antenna concurrently with the formation of a flat phase front and collimation of the...
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6809695 |
Secondary reflector for SHF antennae of the Cassegrain type
The invention concerns the secondary reflectors of SHF antennae of the Cassegrain type. It consists of providing the secondary basic reflector ( 103 ) of this antenna with a first circular ring (...
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6801172 |
Optical-RF mixed antenna
A first reflecting device is provided that reflects electromagnetic and optical signals to a common focus point. An electromagnetic receiver is positioned at the focus point to receive the...
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6795034 |
Gregorian antenna system for shaped beam and multiple frequency use
A method and system for shaped beam and multiple frequency use having a shaped main reflector, two feeds having separate and distinct frequency bands, a first shaped sub-reflector having a...
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6781555 |
Multi-beam antenna communication system and method
A communication system and method for reconfigurably transmitting and receiving signals via a multi-beam reflector antenna array are disclosed. The multi-beam antenna system comprises a plurality...
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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 )...
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6759994 |
Multiple beam antenna using reflective and partially reflective surfaces
A hybrid reflector antenna particularly suited for reflecting a frequency band in a satellite includes a central portion fully reflective to the frequency band. A first annular band is disposed...
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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...
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6741218 |
Multibeam antenna system
A multi-beam antenna system including a parabolic reflector with a parallelogram perimeter, which is illuminated by a plurality of feed elements. The parabolic reflector reflects a first beam...
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6741216 |
Reflector antenna
In order to provide a reflector antenna apparatus which can be installed within a small space, which has adequate practicality, and which can perform scanning by pivoting about two axes which are...
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6724349 |
Splashplate antenna system with improved waveguide and splashplate (sub-reflector) designs
A splashplate antenna system configured using hybrid mode-matching techniques has improved secondary beam characteristics, including improved sidelobe performance, improved electric and magnetic...
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