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6084523 |
Non-intrusive battery status indicator and inventory system
An apparatus and method of measuring and/or determining the status of baty parameters by receiving and/or decoding an RF information signal from a sensor/transceiver located in the target battery,...
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6084540 |
Determination of jammer directions using multiple antenna beam patterns
A radar or GPS receiving system uses an antenna array to produce multiple antenna beams directed toward multiple targets or spacecraft. Stand-off jammers produce signals which tend to be received...
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6081225 |
Radar signal processing chip
A radar signal processing (RSP) chip is used to process massive radar signals. The RSP chip includes a multiply and accumulate (MAC) array and a programmable delayer. The programmable delayer...
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6075479 |
Radar apparatus installed on vehicle for producing correct detecting result
A radar apparatus installed on a vehicle includes a transmission section and a reception section. The transmission section has at least a transmission antenna, and emits a transmission wave toward...
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6072427 |
Precision radar timebase using harmonically related offset oscillators
Two crystal oscillators are configured as a "plug-and-play" precision transmit-receive clock that requires no calibration during manufacture. A first crystal oscillator generates a transmit clock...
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6067042 |
Test beacon for radar system
A test beacon for a radar system includes: a first antenna for receiving a search signal and transmitting a processed search signal, a second antenna for receiving a tracking signal and...
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6061017 |
System for increasing isolation in active radar augmentation systems
In an active radar augmentation system a microwave switch is connected been the receiving antenna and the amplifier. When there is an RF input signal to the receiving antenna of the augmentation...
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6061016 |
Method for the attenuation of the clutter coming from the reflection lobes of a radar antenna
The disclosed method uses the ancillary antennas of a radar, and consists in determining the positions of the phase centers of these ancillary antennas, compensating for the difference in optical...
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6043771 |
Compact, sensitive, low power device for broadband radar detection
A method and system is provided for real-time detection of important multiple pulsed or CW signals of varying amplitude and frequency, from a group of simultaneously intercepted wideband...
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6043772 |
Multi-beam automobile radar system
A multi-beam automobile radar system includes at least one antenna that forms a total of at least two antenna lobes. At least one of these antenna lobes serves to transmit and receive radar...
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6037894 |
Monostatic FMCW radar sensor
According to the invention, a monostatic FMCW radar sensor for a vehicle for detecting objects is proposed in which at least one antenna feed in combination with a dielectric lens is embodied for...
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6034641 |
Antenna device
An antenna device comprises an array antenna having a plurality of transmitting planar antenna elements and a plurality of receiving planar antenna elements, a transmission selecting circuit for...
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6025797 |
Angular shift determining apparatus for determining angular shift of central axis of radar used in automotive obstacle detection system
An angular shift determining apparatus is provided which may be employed in an automotive obstacle detection system designed to determine a distance to and angular direction of a target tracked by...
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6023235 |
Method for generating microwave-resolution images of moving objects by inverse synthetic aperture radar
A method of radar imaging moving objects, especially ground traffic at airports, uses inverse synthetic aperture radar (ISAR). The two-dimensional location distribution of backscatter centers of...
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6018308 |
Obstacle recognition system for automotive vehicle
An obstacle recognition system for automotive vehicles is provided which is designed to distinguish preceding vehicles from other objects and uses data thereof in intervehicle distance control, for...
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6018306 |
Scalable range migration algorithm for high-resolution, large-area SAR imaging
An improved range migration algorithm or processing method that advantageously performs digital synthetic aperture radar image formation processing. The range migration algorithm provides...
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6014108 |
Transverse-folded scanning antennas
Transverse-folded antennas arrange a radiator, twist reflectors and a transreflector to generate a radar beam without blocking the beam with a feed element. The arrangement provides signal access...
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6011506 |
Different models for RF signal train generators and interferoceivers
Interferoceivers are apparatus which use optical fiber loop based radio frequency (RF) signal train generators to store transient pulses and regenerate their identical replicas for analysis. The...
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6008755 |
Antenna-shared distributor and transmission and receiving apparatus using same
An antenna-shared distributor is provided such that a non-conductor section is provided in a part of two conductor planes, a dielectric resonator which resonates in the HE111 mode is disposed...
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6002707 |
Spread signal spectrum communication circuits and system
The present invention provides a covert radar system in which radar signals emitted are capable to search receiver thermal noise and, therefore, are substantially undetectable in the normal radar...
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5986600 |
Pulsed RF oscillator and radar motion sensor
A pulsed RF oscillator employing a BIAS-ON path and a QUENCH path to produce fast turn-on and fast turn-off RF bursts with well-controlled burst width. The oscillator further includes amplitude and...
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5945941 |
Pulsed radar apparatus and method employing power distribution system having reduced cost and weight and enhanced efficiency and reliability
A power distribution system (12) is provided in radar apparatus to distribute power from a 270 VDC source (60) through an intermediate power converter (70) and very high frequency (VHF)...
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5945938 |
RF identification transponder
An RF identification transponder comprises a substrate layer, and an array of M*N antenna elements formed on the substrate layer, where M and N are integers. The antenna elements have a common...
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5943005 |
Multilayer dielectric line circuit
A multilayer dielectric line circuit in which a dielectric line circuit has a multilayer structure so as to be easily formed with a small overall size. In one form of the invention, first and...
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5940025 |
Noise cancellation method and apparatus
A radar transmitter for producing a radar signal in response to a radar trigger signal fed thereto. The transmitter includes a radio frequency oscillator for producing a signal having a radio...
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5933108 |
Gallium arsenide-based vector controller for microwave circuits
A dual mode microwave vector controller apparatus is disclosed for controlling amplitude and phase characteristics of RF signals. A first set of phase shifting integrated circuit chips (PSICs) is...
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5926127 |
Motor vehicle radar system
A motor vehicle radar system in which the position of the transmission/reception elements of the radar system can be changed relative to a focusing element, such as an antenna lens, in order to...
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5914684 |
Electromagnetic transducer system with integrated circuit card adapter
An apparatus according to various aspects of the present invention is configured to collect and/or emit electromagnetic waves, particularly microwaves. In one embodiment, a transducer system...
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5896104 |
FM radar system
An FM radar system of more simple construction, smaller size, lower cost and improved performance is provided in which circulators of any type in the prior art are eliminated by constructing a...
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5867120 |
Transmitter-receiver
A transmitter-receiver whose overall size can be reduced by decreasing areas occupied by a bend portion and a coupler portion of a nonradiative dielectric (NRD) waveguide. The size is not...
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5854604 |
High-power waveform generator
A method and apparatus for generating a low phase noise RF signal where the output from a low phase-noise stabilized local oscillator operating at relatively high frequencies in the GHz range is...
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5839096 |
Self-implementing diagnostic system
A self-implementing, self-diagnostic system for an anticipatory collision sensor system includes a transducer device for transmitting a modulated carrier signal and receiving the reflected...
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5821896 |
Radar system
An image corresponding to an aspect angle computed from tracking data of a target is read out from an actual measurement data base as a reference image, is subjected to a relativity processing with...
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5815112 |
Planar array antenna and phase-comparison monopulse radar system
A planar array antenna comprises a plurality of antenna elements disposed in a predetermined matrix pattern. Feeders extend from a feed to the antenna elements. High-frequency switches...
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5784021 |
Noiseless radar detector
A noiseless radar detector with a dielectric resonator to suppress stray electromagnetic radiation generated by a local oscillator within the radar detector is disclosed. The dielectric resonator...
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5781145 |
Motorcycle mounted radar/laser speed detection countermeasure device
A radar/laser speed detection countermeasure device for use on a motorcycle is disclosed which detects and annunciates radar and/or laser based speed detection devices in use in the immediate...
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5760736 |
Direct X-band waveform generator
X-band signals are generated from the output of a Josephson junction array which is excited by a first RF frequency waveform digitally implemented in a data stream generated by a digital waveform...
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5703595 |
Method and apparatus for erratic doppler frequency shift compensation
A communication system includes base communication units (105, 155) facilitating a communication link with portable communication units (110) in motion relative to base communication units. The...
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5680139 |
Compact microwave and millimeter wave radar
Compact microwave and millimeter wave radars operating at 77 Ghz and having resolution of no less than 3.2 meters at a distance of 100 meters. The exemplary dimensions of the radars are 145...
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5661485 |
Homodyne receiver apparatus and method
An apparatus and method of homodyne reception includes power divider circuitry for providing first and second signals from an input signal. Oscillator circuitry generates first and second...
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5657024 |
Radar module and radar system
The radar module comprises a vertical layered block of a planar array antenna, a signal delay section, and a transmitter-receiver section. The planar array antenna comprises: four antenna portions...
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5646625 |
Radar system
A radar system having a radar transmitter and a radar receiver. The radar receiver includes a "local" receiving station and a "remote" located antenna station. A feedthrough nulling system is...
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5600325 |
Ferro-electric frequency selective surface radome
Ferro-electric frequency selective surface radomes that have dielectric layers that comprise voltage controlled material, and the electrical properties of the dielectric layers are voltage...
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5600327 |
Dielectric waveguide mixer and dielectric waveguide radar module
A non-radiative dielectric waveguide mixer includes at least one conductive plate, a dielectric waveguide held on said conductive plate and a solid-state device disposed across said dielectric...
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5596325 |
FM-CW radar transceiver
An FM-CW radar transceiver comprising an oscillator connected to an input of a power divider having first and second terminal outputs. The first terminal output of the power divider is connected to...
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5592131 |
System and method for modulating a carrier frequency
A carrier frequency modulating system and method for producing a modulated carrier frequency is disclosed. The system comprises a carrier frequency signal generator for producing a carrier...
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5587713 |
Radar transmitter/receivers
A radar transmitter/receiver arrangement for use, for example, in automotive vehicle control in which R.F. energy from a frequency modulated oscillator is applied to an antenna for transmission and...
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5583511 |
Stepped beam active array antenna and radar system employing same
A stepped beam transmit antenna that comprises a feed array that includes a dielectric substrate and a plurality of radiating elements disposed on the substrate. The radiating elements each...
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5565871 |
Police traffic radar for allowing manual rejection of incorrect patrol speed display
A police radar utilizing digital data transmission from the antenna unit to a separately housed counting and display unit. The antenna has a double balanced mixer to suppress even order harmonics....
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5546083 |
Bidirectional repeater amplifier
A double diamond configuration of phase shift circuits are coupled via circulators, amplifiers, power dividers, and power combiners. The circuit arrangement serves to amplify signals in either...
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