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5640168 |
Ultra wide-band radar antenna for concrete penetration
A pyramidal horn antenna that decreases ringing in radar systems that are placed against a solid volume of e.g. concrete or wood for finding an object in or behind the solid volume. The antenna...
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5635944 |
Multi-band antenna feed with switchably shared I/O port
A single integrated antenna feed transmits and receives electromagnetic waves in the C, X, and Ku frequency bands. This antenna feed includes an inner metal tube which lies along a central axis,...
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5617108 |
Simplified tracking antenna
An antenna pointing detection system for use with circularly polarized electromagnetic radiation has a horn, a waveguide and at least one mode switching arm. The horn receives radiation in a...
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5614916 |
Elliptic beam horn antenna
An elliptic beam antenna easy to design and simple in structure. To generate elliptic beams of about the same size regardless of the kind of polarized waves for excitation, a horn antenna or...
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5606331 |
Millennium bandwidth antenna
An antenna for radiating UWB RF pulses is disclosed. The antenna may incl a transverse electromagnetic mode (TEM) horn antenna section connected to a pair of a resistively loaded parallel plates....
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5600336 |
Antenna device and satellite communication reception system
An antenna device for receiving a radio wave transmitted from a communication satellite, converting the received radio wave into an electric signal, amplifying the signal, and outputting the...
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5596338 |
Multifunction antenna assembly
An assembly of antenna elements is mounted in a unitary structure for transport on a satellite encircling the earth. Each element comprises a horn shaped radiator with opposed arcuate sidewalls, a...
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5568160 |
Planar horn array microwave antenna
Planar microwave antennas are described of the type formed from a plurality of moulded planar layers. A first layer defines horn elements and two underlying layers define waveguide channels...
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5552797 |
Die-castable corrugated horns providing elliptical beams
A corrugated horn having ridges disposed on the inner surface of the horn, such that the ridges are oriented parallel to the horn axis, is adapted to provide elliptical beams. When the corrugated...
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5550553 |
Dielectric rod antenna
A dielectric rod antenna including a dielectric rod, a ring-shaped conductive film provided on an outer peripheral surface of the dielectric rod, and a waveguide. The conductive film is provided on...
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5541611 |
VHF/UHF television antenna
A flat planar antenna formed from a flat this substrate coated on one surface with a electrically conductive material except for a first uncoated funnel shaped cavity with a large mouth beginning...
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5517203 |
Dielectric resonator filter with coupling ring and antenna system formed therefrom
A plurality of dual mode, dielectric resonator loaded cavity filters may be coupled to respective ones of a plurality of radiators of an array antenna, such as a phased array antenna. Each of the...
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5515009 |
Space-fed horn for quasi-optical spatial power combiners
A spatial power combiner includes a circularly corrugated horn 26, a meniscus lens 28, an amplifier array 16, and a layer of microwave absorbing material 34 on a housing interior 32. The lens 28...
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5486839 |
Conical corrugated microwave feed horn
A conical corrugated microwave feed horn. A conical flare section is formed at the aperture of the feed horn and a second smooth cylindrical section is formed at the throat of the feed horn. The...
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5471223 |
Low VSWR high efficiency UWB antenna
An antenna for radiating ultra wide bandwidth radio frequency pulses for in communications systems and sensors is disclosed in which a TEM horn is loaded by a resistively loaded parallel plate...
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5463358 |
Multiple channel microwave rotary polarizer
This invention is a multiple channel microwave polarization rotator with external rotary mechanical energy coupling. It finds application in microwave polarization rotators, resolvers, amplitude...
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5463407 |
Dual mode/dual band feed structures
A feed structure (24) is disclosed for reception of orthogonal linearly polarized signals from communication satellites. The structure includes probes (34, 36) extended through the back wall (32)...
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5461394 |
Dual band signal receiver
A dual band signal receiver is provided with relatively coaxial antenna assemblies electromagnetically coupled to respective upper and lower band rectangular waveguides and ports through suitable...
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5459441 |
Signal propagation using high performance dual probe
Signal propagation apparatus is formed with a waveguide cavity for propagating first and second electromagnetic signals respectively having first and second electric fields that are distinguished...
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5459474 |
Active array antenna radar structure
An active array antenna, which may be used for radar, includes antenna elements (antelements) supported in a two-dimensional array. The fronts of the elements are protected by a cover. In order to...
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5459471 |
Flared trough radiator
A double ridge flared trough radiating element, including a double ridge trough waveguide fed by an embedded coaxial or stripline feed network. Energy couples smoothly to and from the feed network...
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5451970 |
Radar antenna unit having a plurality of heat dissipating fins forming on the exterior of a cone shaped chamber
Heat dissipation problems in a sealed radar antenna unit are avoided in a construction including a generally cylindrical body (10) of metal having opposed ends (12, 14) and an interior, cone shaped...
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5450092 |
Ferroelectric scanning RF antenna
The ferroelectric scanning RF antenna includes a ferroelectric material having conductors deposited thereon that are connected to an adjustable d.c. or a.c. voltage source. The scanning antenna is...
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5440316 |
Broadband antennas and electromagnetic field simulators
A structure for use in an antenna or as a broadband electromagnetic field simulator, having an open horn TEM waveguide coupled to launch energy in a strip line formed between a forwardly extending...
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5438340 |
Elliptical feedhorn and parabolic reflector with perpendicular major axes
A parabolic-reflector antenna having a primary horn including first, second, and third hollow portions. The first hollow portion has an elliptical aperture on one end thereof and a circular cross...
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5434585 |
Microwave antenna having a ground isolated feedhorn
A microwave antenna has a circular wave guide feedhorn mounted above a reflector. An electrically insulating sleeve fits around the outer diameter of circular wave guide. A scalar ring is secured...
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5426442 |
Corrugated feed horn array structure
A unitary array of efficient directional corrugated feed horns, each having a desired corrugated horn cross-section within close tolerances, as well as accurate positioning and orientation relative...
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5420597 |
Farfield simulator for testing autotrack antennas
A simulation device is provided for testing autotrack antennas. The device includes a mode coupler and transmit horn which are identical to the mode coupler and transmit horn of the antenna to be...
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5406298 |
Small wideband passive/active antenna
An array of five, ridge waveguide horns provides monopulse operation over a wo octave range. A unique coax-to-ridge waveguide input coupler and an extended ridge matching section at the radiating...
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5404148 |
Phased array antenna module
An antenna having antenna modules for an extremely wideband active monopulse phased array system, the modules including a housing provided with four radiators of the rectangular open-ended...
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5398035 |
Satellite-tracking millimeter-wave reflector antenna system for mobile satellite-tracking
A miniature dual-band two-way mobile satellite-tracking antenna system mounted on a movable vehicle includes a miniature parabolic reflector dish having an elliptical aperture with major and minor...
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5374938 |
Waveguide to microstrip conversion means in a satellite broadcasting adaptor
A waveguide to microstrip converter allowing size reduction as well as providing good cross polar discrimination and input VSWR characteristic. The waveguide to microstrip converter includes a...
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5359336 |
Circularly polarized wave generator and circularly polarized wave receiving antenna
A circularly polarized generator for transmitting circularly polarized transmitted electromagnetic waves and a circularly polarized wave reception antenna for receiving the electromagnetic waves is...
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5359339 |
Broadband short-horn antenna
A short horn antenna (10) adapted for array use includes a rectangular waveguide with broad upper (12) and lower (14) walls and narrow side walls (16, 18), defining a radiating aperture (20) and a...
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5359338 |
Linear conformal antenna array for scanning near end-fire in one direction
A linear conformal array antenna consisting of double-ridged waveguide elements which are all tapered in the E-plane or the H-plane. The array of waveguide elements is fed by a Gent lens whose...
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5331332 |
Waveguide coupling structure
A structure (20) coupling a microwave signal to a waveguide (30) is provided. Transmission walls (26) are supported in the waveguide to only partially surround a probe (22) extending longitudinally...
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5327147 |
Microwave array antenna having sources of different widths
A microwave array antenna comprises a plurality of like unit sources whose width increases progressively from the center of the array towards its ends and which are disposed relative to each other...
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5325105 |
Ultra-broadband TEM double flared exponential horn antenna
An ultra-broadband transverse electromagnetic (TEM) exponential antenna in which the radiating or receiving structure comprises first and second elongated conductors have a feed end comprising...
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5323169 |
Compact, high-gain, ultra-wide band (UWB) transverse electromagnetic (TEM) planar transmission-line-array horn antenna
An antenna for the radiation of ultra-wideband pulsed electromagnetic radiation. The invention is a high gain, transverse electromagnetic parallel-plate, open-sided transmission-line array horn...
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5317329 |
Microwave detector and horn antenna structure therefor
A microwave detector arranged in such a manner that a horn antenna element is fastened to the surface of a microstrip plate having a ground plate on its reverse side. The horn antenna element and...
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5317328 |
Horn reflector antenna with absorber lined conical feed
A conical horn microwave antenna has a reflector positioned at the large end of a conical feed horn which has the side walls of the horn wider than the projected effective area of the reflector...
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5305001 |
Horn radiator assembly with stepped septum polarizer
A circularly polarized wave entering the horn is converted to a linearly polarized wave which appears in one of the ports depending on the sense of the polarization. The stepped configuration of...
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5305000 |
Low loss electromagnetic energy probe
A low noise block feedhorn system includes a waveguide antenna for receiving RF signals. The transition element is a waveguide to coaxial line probe assembly which includes a high conductivity...
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5276456 |
Antenna feed with selectable relative polarization
An antenna feed having a common circular waveguide with a longitudinally extending rectangular slot in a wall thereof and defining a receive port. An iris is rotatably connected adjacent the...
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5258768 |
Dual band frequency reuse antenna
A dual frequency band antenna (10) having frequency reuse capability. The antenna waveguide (12) includes a four port waveguide network which transmits and receives orthogonal, linearly polarized...
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5255003 |
Multiple-frequency microwave feed assembly
A multiple-frequency feed assembly for an antenna system having two coaxial cavities, with a smaller, high-frequency cavity mounted coaxially within a larger, low-frequency cavity. A separate...
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5248987 |
Widebeam antenna
The widebeam antenna includes a tapered dielectric waveguide having a radiating end and an end for coupling electromagnetic energy into and out of the dielectric waveguide. A conducting sleeve...
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5245353 |
Dual waveguide probes extending through back wall
Waveguide OMT, which can be utilized as an antenna feed, has two orthogonally polarized coaxial ports extending through the back wall of the waveguide. Cross coupling between the probes is...
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5229736 |
Waveguide polarization coupling
A waveguide and a scaler ring assembly in which the waveguide has external threads and the scaler ring has internal threads for threaded mating engagement so that the position of the waveguide can...
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5220330 |
Broadband conformal inclined slotline antenna array
A missile guidance antenna that is conformal to the missile surface, dual-polarized and broadband. Slotline notch array elements (30, 52) are inclined toward boresight for both the E and H-planes....
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