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4903038 |
Horn antenna arrangement
A horn antenna arrangement comprising an H-plane sectoral horn 19 in combination with a feeder waveguide 2 in which radio-frequency energy is launched and propagated in the fundamental rectangular...
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4903037 |
Dual frequency microwave feed assembly
A dual frequency feed assembly for antenna systems employing a pair of rotatably mounted probes each in respective coaxial cavities. The smaller cavity is supported by the rotating means for the...
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4902988 |
Control for flexible probe
An electrically-conductive flexible probe is mounted within a wave guide that receives radio-frequency electromagnetic radiation. A leading portion of the probe has an orientation that is...
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4901369 |
Microwave transmitter/receiver apparatus
The invention eliminates polarization problems and feeder waveguide loss in a miniature microwave transmitter/receiver. This is done by providing a massive heat sink, metal housing with a primary...
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4897663 |
Horn antenna with a choke surface-wave structure on the outer surface thereof
A horn antenna for radiating or receiving a microwave is provided with a plurality of axially spaced radial fins fixedly mounted on the outer surface of the horn, which fins form a plurality of...
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4896163 |
Microwave receiving device
A microwave receiving device of this invention includes a primary radiator and a low-noise converter arranged integrally therewith. One end of a chassis of the microwave receiving device is...
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4890118 |
Compensated microwave feed horn
A feed horn employing a novel compensator design which substantially reduces off-axis cross polarized components of circularly polarized energy over a wide range of angular directions. The...
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4888596 |
Method and apparatus for determining earth station parameters such as rain margin, with attenuation pads
Methods and apparatus for determining operating parameters, such as rain margin, of an antenna by attenuating the received signal by, for example, the use of calibrated attenuation pads, the method...
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4888597 |
Millimeter and submillimeter wave antenna structure
An integrated circuit antenna structure for transmitting or receiving millimeter and/or submillimeter wave radiation having an antenna relatively unimpaired by the antenna mounting arrangment is...
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4885593 |
Feeds for compact ranges
Circular open ended waveguide feeds for compact ranges. Feeds according to the present invention employ smaller apertures for a given frequency of operation than a standard compact range feed....
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4885556 |
Circularly polarized evanescent mode radiator
A nearly square waveguide below cutoff has a microstrip substrate disposed diagonally therein. A first shunt capacitance is provided by either a conductor formed on the microstrip substrate or a...
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4878060 |
Microwave plane antenna with suspended substrate system of lines and method for manufacturing a component
Multi-element microwave plane antenna formed from at least two metallic sheets (156, 157) on which separating studs (4, 19) are silk-screen printed and on which is inserted at least one block (50)...
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4878061 |
Broadband wide flare ridged microwave horn antenna
A fast-flared horn antenna for use in a microwave detector comprises an upwardly flared top wall, a downwardly flared bottom wall, and outwardly flared side walls extending between the top wall and...
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4876554 |
Pillbox antenna and antenna assembly
A directive communications antenna comprising upper and lower plates, each having a leading edge, and a parabolic reflecting cylinder disposed between and axially intersecting the plates so as to...
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4873534 |
Hybrid mode feed horn having funnel-shaped horn flange with grooved conical inner surface
A hybrid-mode feed horn for feeding a reflector from the primary focus has a flange provided with grooves in an inner funnel-shaped surface thereof. The horn flange is formed to enable illumination...
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4870426 |
Dual band antenna element
A radar antenna element comprises a lower band waveguide and an array of parallel, dual-polarized, higher band waveguides and dipoles mounted within or directly adjacent an aperture of the lower...
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4864319 |
Radio frequency antenna with small cross-section
An array antenna is shown, the disclosed antenna having an effective cross-sectional area which is lower than its physical cross-sectional area. The reduction in effective cross-sectional area is...
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4862187 |
Dual band feedhorn with two different dipole sets
A feedhorn for a satellite dish which is far more efficient picking up the transmitted microwave signal from a satellite so as to permit the satellite dish to be substantially decreased in physical...
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4845508 |
Electric wave device and method for efficient excitation of a dielectric rod
An electric wave operating device for efficiently coupling electromagnetic energy from a waveguide into a dielectric element or vice versa. A waveguide horn portion is chosen for radiating in the...
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4829314 |
Microwave plane antenna simultaneously receiving two polarizations
Multi-element microwave plane antenna for receiving satellite television signals with two simultaneous polarizations. The antenna is provided with two systems of lines (1) whose ends (3, 30) form...
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4829315 |
Dual frequency feed apparatus
The invention comprises a switching mechanism for a micro wave signal dish receiver apparatus. The mechanism has means for switching a wave guide of a 12 GHZ frequency signal into and out of...
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4829313 |
Drive system and filament for a twistable septum in a feedhorn
A drive system for a twistable septum in a feedhorn for use in satellite communications antenna systems. The drive system includes a flexible drive rod, coupled to a drive motor, which bends to...
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4827276 |
Microwave antenna
A planar microwave antenna of the suspended line feed type has a substrate sandwiched between a pair of conductive plates, each of the plates having aligned openings defining radiation elements....
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4821046 |
Dual band feed system
A dual frequency band microwave antenna feed for a parabolic reflector has a circular waveguide for a low frequency band and a smaller circular waveguide for a higher frequency band disposed in and...
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4819004 |
Printed circuit array antenna
A printed circuit array antenna includes at least one printed circuit formed by a substrate having radiating elements on a first face and an energy distribution tree on a second face. The array...
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4819005 |
Concentric waveguides for a dual-band feed system
A dual-band linear cross-polarized antenna waveguide comprising a coaxial pair of waveguides, with the higher frequency band waveguide contained completely within the TE 01 mode null of the lower...
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4811028 |
Quadridge antenna for space vehicle
The invention is directed to a quadridge antenna situated within a quadri-fluted module. The tips of the ridge elements are recessed a distance below the surface of the window aperture.
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4803495 |
Radio frequency array antenna with energy resistive material
An array antenna is provided wherein each adjacent pair of a plurality of antenna elements in such array antenna have a common, conductive wall having a castellated radiating edge. Radio frequency...
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4801945 |
Low loss dual band satellite antenna feed
A versatile dual band satellite system includes a main conductive mounting plate member with a central opening of a predetermined size, and a KU band pick-up unit mounted in the plate to face a...
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4797681 |
Dual-mode circular-polarization horn
A dual mode circularly polarized horn radiator is useful in the testing of radiation apparatus in an anechoic chamber. The horn has a buffered radiating aperture which permits a plurality of the...
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4792814 |
Conical horn antenna applicable to plural modes of electromagnetic waves
A conical horn antenna applicable to plural modes of electromagnetic waves is substantially composed of a feed waveguide positioned on the base end side and feeding a dominant mode of an...
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4788554 |
Plated plastic injection molded horn for antenna
An antenna horn of molded plastic construction. The horn may be constructed of multiple sections, each section being of molded plastic construction with the sections joined to form the horn.
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4788553 |
Doppler radar velocity measurement apparatus
Doppler radar apparatus for use in a velocity measuring system for farm tractors and the like. The apparatus includes a dual mode conical horn having a flare angle substantially in excess of...
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4785306 |
Dual frequency feed satellite antenna horn
A feed horn arrangement for reception of C-band and Ku-band signals by a single satellite antenna. The arrangement permits a Ku-band feed horn and amplifier to be mounted at the focus of a...
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4783665 |
Hybrid mode horn antennas
A horn antenna with a cylindrical and an expanded (horn-shaped) waveguide for radiating or receiving polarized electromagnetic waves. The waveguide wall is partially or wholly covered with one or...
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4783663 |
Unit modules for a high-frequency antenna and high-frequency antenna comprising such modules
In a high-frequency antenna comprising a plurality of horns 1, phase differences arising in these horns 1 would need to be corrected. Such phase differences are avoided by providing a planar design...
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4775867 |
Vibration isolation enclosure for horn antenna
A vibration isolation and EMI/RFI shielded enclosure for a horn antenna comprises an elongate hollow housing of sufficient dimensions to receive the horn antenna therewithin. Respective front and...
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4764775 |
Multi-mode feed horn
A linearally polarized multiport multimode feed for a reflector type antenna generates a plurality of beams, each in a different pointing direction, from a single radiating aperture. Each beam...
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4760404 |
Device and method for separating short-wavelength and long-wavelength signals
A device for separating signals in the long or radar wavelength bands from signals in the short or infrared to ultraviolet wavelength bands which occupy a common area. A waveguide for directing...
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4760403 |
Polarized signal receiver probe provided with a bifurcated transmission line
A polarized signal receiver waveguide assembly, or feedhorn, for receiving a selected one of linearly polarized electromagnetic signals in one waveguide of circular cross-section and for launching...
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4758841 |
Polarized signal receiver probe
A polarized signal receiver waveguide assembly, or feedhorn, for receiving a selected one of linearly polarized electromagnetic signals in one waveguide of circular cross-section and for launching...
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4758842 |
Horn antenna array phase matched over large bandwidths
An array of horn antennas with non-uniform aperture sizes is disclosed wherein the individual horns phase track over a wide frequency band. The horn with the smallest aperture is considered the...
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4757324 |
Antenna array with hexagonal horns
An array of flared horn antennas is adapted to be fed from circular waveguide. The apertures of the horns are closely spaced. Prior art horns with circular apertures leave gaps in the aperture. The...
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4757326 |
Box horn antenna with linearized aperture distribution in two polarizations
An antenna selectively fed from a square waveguide in one of two orthogonal linear TE 1 ,0 modes includes a transition between the square waveguide and a larger square horn. A transition...
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4755828 |
Polarized signal receiver waveguides and probe
A polarized signal receiver waveguide assembly, or feedhorn, for receiving a selected one of linearly polarized electromagnetic signals in one waveguide of circular cross-section and for launching...
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4743915 |
Four-horn radiating modules with integral power divider/supply network
A high-frequency antenna unit module for receiving or transmitting a rectilinearly polarized wave including radiating elements in the form of horns and a waveguide supply network. The module has...
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4740795 |
Dual frequency antenna feeding with coincident phase centers
A dual frequency antenna feed includes colinear axially spaced coaxial and circular waveguide cavities separated by a conducting portion having a high frequency rectangular waveguide therein...
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4734660 |
Signal polarization rotator
The signal polarization rotator of this invention utilizes a rotatable signal transition structure having one section which acts as a coaxial transmission line center conductor, a section suspended...
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4731616 |
Antenna horns
Antenna horns for use as part of antenna system such as an offset parabolic antenna system. The horns of this antenna include a plurality of sections which enable the propagation of both the TE 1...
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4714930 |
Antenna feed polarizer
This invention relates to rotatable antenna feed polarizers for use in communication antenna systems, and seeks to provide, at economic cost, an antenna feed polarizer which is capable of being...
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