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7630061 |
Radar sensors for motor vehicles
A radar sensor for motor vehicles, having an optical system which subdivides a radar beam generated by a single antenna element into a plurality of beam components that are radiated in different...
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7573369 |
System and method for interrogating and locating a transponder relative to a zone-of-interest
A directional warning system and a method of warning of friendly forces. In one embodiment, the system includes: (1) a conductive shield having an opening at an end thereof and a radio frequency...
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7196655 |
System and method for highly directional electronic identification and communication and combat identification system employing the same
An antenna for directional electronic communication, a directional communication system, a method of conducting directional communication, a combat identification system and a method of identifying...
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7179844 |
Dielectric resin foam and lens for radio waves using the same
It is an object of the present invention to provide a dielectric resin foam which has high and uniform dielectric properties and is preferable for use as various dielectric materials. A dielectric...
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6208288 |
Millimeter wave all azimuth field of view surveillance and imaging system
A passive millimeter-wave imaging system (10) is disclosed that provides a full 360° instantaneous azimuthal field-of-view (54) image of a scene. The imaging system (10) makes use of a spherical...
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6169910 |
Focused narrow beam communication system
A system for establishing and utilizing a wireless communication system using a lens antenna having a dielectric material lens. The lens focuses output radio frequency (rf) signals into narrow beam...
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5680136 |
Electrically adjustable microwave reflector and application as an electromagnetic decoy
A microwave radar reflector includes three, substantially planar networks whose reflectivity or transmissivity may be controlled. The three networks are arranged as a trihedron with an open angle....
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5430444 |
Radar reflectors
A radar reflector comprises a pair of opposed colinear solid dielectric lens reflectors (10) and two corner reflectors (11) between to provide substantially uniform and high reflectivity in the...
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5170167 |
Reflector for electromagnetic energy
A lightweight radar reflector comprising two converging lenses (21 and 22) with a reflecting surface (26) applied to the outer convex surface of one of the lenses. The lenses are preferably...
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4989007 |
Passive radar augmented projectile (PRAP)
The invention disclosed relates to gun-launched target projectiles wherein a radar-augmentor is included to increase the radar cross-section of the projectile to simulate on radar, an actual...
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4973965 |
Passive radar target
A passive radar target comprises a sond lens (50) of substantially uniform dielectric constant, having a reflecting surface (51) integrally formed therewith, the lens being constructed of...
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4419669 |
Controlled scintillation rate decoy
A controlled scintillation rate decoy having microwave reflectors for reflecting incident radar energy in a manner to provide the decoy with a selected radar cross-section, and variable electrical...
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4370654 |
Apparatus for producing a frequency change of a wage propagating signal
The present invention is an apparatus for producing a frequency change of wave propagating energy including microwave radar beams, electro-optical signals, other electro-magnetic signals, acoustic...
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4366962 |
Low drag, light weight towed target
A modular target apparatus is described, which is adapted to be towed behind a towing vehicle, typically an aircraft. The modular apparatus includes a fore body, an aft body, and a thrust bearing...
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4314249 |
Radar reflector with variable electric reflectivity
A radar reflector which reradiates identification and other information to a radar station upon reception of electromagnetic radar waves therefrom. The reflector is composed of plural metallic...
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4090198 |
Passive reflectance modulator
1. A reflectance modulator exhibiting an omni-azimuttal reflectance pattern comprising a microwave lens for focusing electromagnetic energy, a plurality of reflector means positioned on a focal...
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4031535 |
Multiple frequency navigation radar system
A navigation system in which a transmitter-antenna combination radiates two independent signals with a known frequency separation there between. These signals are radiated to an antenna on a...
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3972043 |
Cross-polarizing lens reflector
A Luneberg lens with a polarization-sensitive spherical "leaky" reflector cap having conductive strips aligned at a 45° angle to the linear polarization of the incident wave. The ratio of strip...
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3896440 |
Retrodirective passive beacon for simulating a moving target
There is disclosed a retrodirective passive beacon for use with MTI radar (moving-target-indicator radar) for mapping in heavy clutter or foliage and the like. The signal which this beacon reflects...
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3866226 |
RADAR-AUGMENTED SUB-TARGET
A remote controlled drone aircraft carrying radar-augmented targets or so-called "sub-targets" which are rocket powered and can be individually launched from the drone when at the proper place and...
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3860927 |
DIELECTRIC REFLECTOR FOR ELECTRIC WAVES
A weatherproof dielectric reflector for electric waves having a spherical dielectric lens, an annular electric wave reflector of predetermined width disposed on the spherical surface of the...
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3787856 |
SPHERICAL MICROWAVE LENSES
A spherical microwave lens and reflector arrangement in which the reflector is part-spherical and is mounted so as to be movable towards and away from the lens in order that variations in the phase...
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3703723 |
PORTABLE PASSIVE REFLECTOR
A portable passive reflector that utilizes a Luneberg lens to focus upon a diode array positioned about the focal region of the lens, an interrogating signal eminating from a predetermined...
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3413636 |
Radar cross section augmenter
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3334345 |
Passive radar target augmentor
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3307187 |
Omniazimuthal reflectors
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3295132 |
Modulating radar reflector
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3290681 |
Device for jamming radar detection and interception of ballistic missiles
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3283324 |
Means for changing the radar signature of aerial vehicles
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3251061 |
Microwave reflector
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3243816 |
Final approach landing system
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3206749 |
Spherical checkerboard reflector
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3167769 |
Radio frequency reflector
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3158862 |
Wide-angle electrically-modulated reflector
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3145382 |
Microwave reflector
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3020542 |
Mounting aircraft with plural spherical luneberg radar reflective lenses and mountingmeans
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3019432 |
Aircraft with support for a plurality of luneberg reflective lenses
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2936453 |
Passive reflector
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2921305 |
Microwave reflector
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2866971 |
Radiant energy reflector
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2835891 |
Virtual image luneberg lens
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