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8164308 |
Apparatus and method for capturing cosmic background radiation and converting the same to electricity
There is provided an apparatus for capturing cosmic background radiation and for converting cosmic background radiation into electricity. An antenna is configured so as to capture cosmic background...
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8066218 |
Anti-missile defense suite
A system and method for an aircraft (10) that provides an IR decoy (12) for an incoming missile (18) to track instead of an engine (14) of the aircraft (10) is disclosed. The IR decoy (12) is...
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8017217 |
Variable emissivity material
A material of variable emissivity includes a first metallic layer having a first aperture, a second metallic layer having a second aperture, and a variable dielectric layer interposed between the...
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7965220 |
Smart chaff
A chaff element for interfering with radar signals. The chaff element has a dielectric substrate and a pair of elongate electrically conductive elements, having a total length of approximately...
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7847721 |
Decoy for deceiving radar systems, especially doppler radar systems
The present invention relates to a decoy for deceiving radar systems, especially Doppler radar systems. The decoy comprises a corner reflector, where at least one of the surfaces (1) is arranged to...
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7808420 |
Electromagnetic imaging by four dimensional parallel computing
Method for organizing computer operations on a system of parallel processors to invert electromagnetic field data (11) from a controlled-source electromagnetic survey of a subsurface region to...
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7719462 |
Time-of-flight radar calibration system
A time-of-flight calibration system for a radar-based measurement device is provided. The time-of-flight calibration system includes a target antenna and a waveguide, e.g. a coaxial cable. The...
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7672480 |
Method for photographing on board of a flying rotating body and system for carrying out said method
The invention relates to a method for photographing on board of a flying rotating body and system for carrying out said method. According to said invention, pictures (V0, V90, V180, V270) are taken...
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7486226 |
Device and a method for accurate radar level gauging
The invention relates to a system, device, and method for using radar signals to measure the distance (h) to a surface from said device, the device comprising a transmitter and a transmitting...
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7283085 |
System and method for efficient, high-resolution microwave imaging using complementary transmit and receive beam patterns
A scanning panel for use in a microwave imaging system captures a microwave image of a target using two complementary arrays of antenna elements. Each of the antenna elements in a first array is...
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6798349 |
Passive microwave tag identification system
A system for identification and tracking of microwave responsive tags, the system comprising, a microwave responsive tag having a passive modulating element to uniquely backscatter directed...
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6792383 |
Passive ranging system and method
A system and method for ascertaining the range of a noise-jamming target. The system includes a receiver; a data processor coupled to the receiver; and software adapted for execution by the data...
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6664916 |
System and method for identifying navigational markers using radar
A system containing a navigational marker, the navigational marker having the ability to reflect radar in such a manner that the navigational marker is identified. In one embodiment, a polarized...
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6571714 |
Silicon window infrared augmenter
There is provided an electrically powered augmenter device that has a silicon window. The silicon window emits the infrared radiation from the augmenter in a specific waveband, to attract heat...
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6570525 |
Method and device for the encoding and decoding of power distribution at the outputs of a system
In a method and device for the encoding/decoding of power distribution at outputs of a system, a distribution encoder includes an element that receives a useful input signal and a piece of...
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6559790 |
Broadband passive moving target simulator
The invention is a radar decoy which electronically simulates objects by generating radar detectable signals over the entire microwave frequency range. The simulator includes a series of tuned,...
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6529154 |
Method and apparatus for reading two dimensional identification symbols using radar techniques
A method and apparatus are provided for sensing two-dimensional identification marks provided on a substrate or embedded within a substrate below a surface of the substrate. Micropower impulse...
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6456225 |
Reflector circuit
A reflector circuit is provided which responds to illuminating radiation with corresponding output radiation of increased magnitude relative to the illuminating radiation, while also providing a...
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6300894 |
Antenna having electrically controllable radar cross-section
An RF interface is configured as a laminate structure having a core layer of a ferromagnetic ceramic material, such as barium strontium titanate, whose permitivity is electrically controllable to...
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5841392 |
Pulse-echo ranging system with improved target
A pulse-echo ranging system includes an improved target and a ranging device which emits pulses of electromagnetic radiation toward the target and receives pulses reflected from the target. The...
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5819164 |
Modulated retroreflection system for secure communication and identification
A modulated retroreflection system for secure two-way communication and identification includes a transceiver at a first location and a transponder at a second location. The transponder receiving,...
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5808577 |
Stealth aircraft identification system
The invention is an identification friend or foe system for an aircraft providing identification information when illuminated by an incident radar signal. In detail, the system includes at least a...
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5796362 |
Post launch on-board identification friend or foe system
A post launch identification friend or foe fire control system for a munition has an identification and ranging interrogation unit for mounting on a munition. The interrogation unit transmits an...
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5748138 |
Synchronous identification of friendly targets
A synchronous communication targeting system for use in battle. The present invention includes a transceiver having a stabilizing oscillator, a synchronous amplifier and an omnidirectional...
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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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5673049 |
Police radar jammer
A method to confuse a police radar by moving a multiplicity of radar reflector antennas in the field of view of the radar. The moving radar reflector antennas present continuously changing doppler...
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5670959 |
Antenna reflector
An antenna reflector, which can reflect incoming radio waves, is formed as a corner of a cube by orthogonally connecting three reflectors which can reflect incoming radio waves. The reflectors are...
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5590031 |
System for converting electromagnetic radiation energy to electrical energy
A system is disclosed for converting high frequency zero point electromagnetic radiation energy to electrical energy. The system includes a pair of dielectric structures which are positioned...
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5583507 |
Passive identification of friend vs. foe apparatus and method
A method and apparatus for passive identification includes a series of elements preferably in the form of strips, bars or other geometric shapes, or as dipole antennas made of a material having...
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5570230 |
Retroreflector for laser geodesy with omnidirectional correction of speed aberrations
A cube-corner retroreflector for laser telemetry corrects speed aberration δ and has three substantially orthogonal mirror surfaces defining three substantially orthogonal edges converging at an ...
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5508704 |
Method and apparatus for modulating a doppler radar signal
There is disclosed herein a system for reflecting electromagnetic radiation emanating from a doppler-based radar source toward the source whereby at least a portion of the difference between the...
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5501724 |
Coating composition for attenuating reflection of electromagnetic radiation
A coating composition for the attenuation of the reflection electromagnetic radiation and particularly electromagnetic radiation have a wavelength of greater than 800 nm including the near infrared...
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5493301 |
Spin determination of KE projectiles
A technique for determining the spin history of kinetic energy penetrator projectiles. The method employs a special dihedral plug fitting in the rear (tracer well) of the penetrator projectile that...
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5459470 |
Beam steered laser IFF system
A system (10) for friend-or-foe identification (IFF) comprises an interrogator unit (18) carried on a first platform (T1) for generating and transmitting a laser beam. A control unit (22)...
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5459468 |
Pulsing radar reflector
An apparatus for use, for example, as a runway radar signal reflector, for reflecting incoming radar signals, which includes a reflector for reflecting the radar signals, a chamber through which...
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5424737 |
Communications retro-reflector
A lens such as a Luneberg lens is used in a retro-reflector having a plurality of reflector elements formed in a mosaic covering a predetermined portion of the lens. Each of the reflector elements...
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5369408 |
Self-mixing expendable
This invention is directed to an expendable which includes an electronic circuit for introducing a simulated Doppler frequency shift. When dropped from an aircraft, the expendable is used to...
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5345243 |
Continuous-wave reflection transmissometer with target discrimination using modulated targets
The attenuation of electromagnetic waves by a transmission medium is detected or measured by directing a continuous periodic electromagnetic wave toward a reflector. The reflector is modulated to...
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5319373 |
Method and apparatus for determining ship position in a television image
Apparatus for detecting the position of a vessel in a broadcast image of the radar scan in a radar monitored area includes a television monitor for displaying a broadcast image of a radar scan of...
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5307068 |
Tunable high-frequency devices
A tunable high-frequency device using a superconductive thin layer with a thickness smaller than the thickness of penetration of a magnetic field is positioned on a dielectric layer. Also included...
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5274379 |
Optical identification friend-or-foe
An identification friend-or-foe system for vehicles wherein each vehicle is provided with a radiation transmitter and a receiver with a detector for detecting radiation transmitted by other...
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5223839 |
Radar identification
An improved passive IFF system operating as a supplement to a conventional adar system including a coded variable delay system to produce like time-coded variable phase delayed identifying signal...
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5204680 |
Radar reflecting target for reducing radar cross-section
A radar reflecting target comprises a plurality of reflecting elements spread along at least one linear physical dimension of the target, the elements being differingly spaced in the direction...
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5202689 |
Lightweight focusing reflector for space
An adjustable focal length reflector for operation in space includes a membrane having a reflective surface. The membrane is subjected to incident radiation pressure. An assembly is located at the...
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5036323 |
Active radar stealth device
An active radar stealth device mounted on a host platform for minimizing radar cross-section of the host platform. A coating which is essentially microwave transparent is attached to the surface of...
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5008677 |
Anti-jamming device for a radar provided with a reflector antenna
A reflector of an antenna in a radar system subject to jamming carries a multiplicity of localized phase shifters which are sequentially controlled by a processor to introduce certain phase...
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5007721 |
Mechanically rotated Doppler frequency shifter
A mechanical Doppler shifting device for a high frequency radiated beam comprises a rotating helical reflector having its axis of rotation parallel to the beam and a plane stationary mirror mounted...
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5003600 |
Diffraction gratings used as identifying markers
A finely detailed defraction grating is applied to an object as an identifier or tag which is unambiguous, difficult to duplicate, or remove and transfer to another item, and can be read and...
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4987418 |
Ferroelectric panel
An arrangement for modifying impressed radars signals with an internally generated signal to establish a misrepresentative return signal which is confusing as to actual range, size and position.
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4972192 |
Constant amplitude doppler producing radar reflector
A constant amplitude Doppler producing radar reflector for simulating a moving target. A plurality of dihedral reflectors having equal radar cross sections are rotated axially at equal rotational...
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