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6950062 |
Method and structure for phased array antenna interconnect using an array of substrate slats
A phased array antenna is formed from an array of apertures having walls containing phase shifter devices for phase shifting and beam steering a radiated beam of the phased array antenna. The phase...
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6937112 |
S/N enhancer
A S/N enhancer using the magnetostatic wave signal. The S/N enhancer comprises a balun coupler for dividing an input signal into a first and second signals having the same power, the second signal...
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6906681 |
Multicarrier distributed active antenna
A distributed active antenna includes a power module having a parallel combination of power amplifiers for driving each antenna element of the distributed active antenna. A predistortion...
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6906666 |
Beam adjusting device
A device for adjusting the beam direction of a beam radiated from a stationary array of antenna elements. The device includes a feed line structure configured as a star with at least four line...
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6901062 |
Adaptive antenna array wireless data access point
The invention provides systems and methods for providing improved wireless data communication. Preferred embodiments of the present invention utilize multiple antenna beams in the forward link to...
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6895230 |
System and method for delay equalization of multiple transmission paths
The present invention provides systems and methods for addressing the effects of non-linear phase response, such as by equalizing electrical delays among transmission paths. A preferred embodiment...
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6891497 |
Chirp-based method and apparatus for performing phase calibration across phased array antenna
A chirp-based method and apparatus measures phase variation through a reference frequency transport cable for a phased array antenna. A chirp is injected into the a signal transport path from a...
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6891987 |
Multi-aperture beam steering system with wavefront correction based on a tunable optical delay line
A true-time delay feeder for multiple aperture beam steering devices. The feeder comprises a plurality of tunable time delay modules. The tunable time delay modules provide different delays to...
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6892054 |
Interference suppression for wireless local area network and location system
A wireless local area network and location system for locating objects within a monitored environment are disclosed. A plurality of access point stations receive and transmit communication signals...
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6888501 |
Radio reception apparatus and directivity reception method
Delay profile creation sections 7 and 8 create a delay profile for each of fixed directivity reception signals combined using a plurality of fixed weight patterns. A path search section 11 ...
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6864838 |
Ranging system and method for satellites
In a satellite ranging system predetermined bit sequence or group of bit sequence in a transport stream, which is a digital signal are used to generate trigger signals on the basis of which the...
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6831602 |
Low cost trombone line beamformer
A microstrip trombone delay line is used to provide a low cost true time delay device. An array of printed trombone lines arranged in a network is used to implement a linear beamformer. The...
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6828935 |
Digitally synthesized phased antenna for multibeam global positioning
In a system according to the proposed technique (see figure), the signal received by each element of the array antenna would be subjected to downconversion, and spread-spectrum demodulation and...
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6825815 |
Steerable uplink antenna for moveable redundant beams
A satellite antenna system ( 30 ) that employs a small phased antenna array ( 46 ) acting as redundant antenna. Because the phased array ( 46 ) is steerable, it can be selectively directed to any...
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6819291 |
Reduced-size GPS antennas for anti-jam adaptive processing
A reduced-size GPS antenna with anti-jam capabilities includes eight inclined monopole elements making available a primary and seven auxiliary antenna patterns usable with multi-pattern adaptive...
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6768458 |
Photonically controlled active array radar system
An active array radar system is controlled by photonic signals. The array of N antenna elements is divided into M subarrays, each having N/M antenna elements. Tunable lasers provide M optical...
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6765530 |
Array antenna having pairs of antenna elements
An antenna apparatus capable of generating scanning beams through a range of 0°-90° is provided. The antenna apparatus includes one or more rows of antenna elements, with the antenna elements in...
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6759980 |
Phased array antennas incorporating voltage-tunable phase shifters
This invention provides a phased array antenna comprising an input, a feed network electronically coupled to the input, a plurality of radiating elements, a plurality of continuously voltage...
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6751262 |
Data transmission method
A data transmission method, particularly in electric networks, in which coded data are blockwise modulated onto several carrier frequencies within one or several particular frequency bands by an...
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6741207 |
Multi-bit phase shifters using MEM RF switches
An RF phase shifter circuit includes first and second RF ports, and a switch circuit comprising a plurality of micro-electro-mechanical (“MEM”) switches responsive to control signals. The...
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6690325 |
Method and apparatus for generating true time delays
An optical method and apparatus for generating true time delay signals for a phased array antenna. An optical beam is directed along a series of N paths of equal length L having U-turns...
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6683566 |
Electronic active phase control array antenna, method for compensating for direction differences at the antenna, and satellite tracking system and method using the antenna
Disclosed is an electronic active phase control array antenna having two beams which comprises: a first array unit for performing phase shifting on radio waves received via satellite communication,...
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6677897 |
Solid state transmitter circuit
A microwave transmitter circuit including a divider series feed signal line, collector series feed signal line, a plurality of parallel solid state amplifier coupler circuits connected between the...
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6670919 |
Adaptive antenna receiving apparatus
In an adaptive antenna receiving apparatus, a plurality of correlations between adjacent antennas are detected for each path, a fixed beam unique to each path arrival direction of the desired wave...
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6661377 |
Phased array antenna using gain switched multimode fabry-perot laser diode and high-dispersion-fiber
The present invention is about phased array antenna using gain switched multimode Fabry-Perot laser diode (FP-LD) and high-dispersion fiber. More particularly, the invention deals with techniques...
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6650910 |
Methods and apparatus in antenna diversity systems for estimation of direction of arrival
The present invention relates to radio systems and, more particularly, to a method and apparatus for receiving radio signals with the aid of beams generated by antenna assemblies. For each of the...
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6647246 |
Apparatus and method of synchronization using delay measurements
This invention pertains in general to a method of synchronizing remote stations in a communications system and, more particularly, to a method for measuring delay between two remote stations in a...
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6618007 |
Adaptive weight calculation preprocessor
In accordance with one aspect of the present invention, a preprocessor is provided for use in an adaptive antenna array. The purpose of the preprocessor is to modify the incoming signals received...
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6600993 |
Navigation system
A navigation system is provided with: a present position detecting device for detecting a present position of a movable body; a reading device for reading map data recorded on a recording medium; a...
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6590531 |
Planar, fractal, time-delay beamformer
An antenna beamformer is disclosed that uses controllable time delay elements distributed in a planar fractal feed network between the input port and multiple output ports. The use of time delay...
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6574021 |
Reactive combiner for active array radar system
An active array radar system is controlled by photonic signals. The array of N antenna elements is divided into M subarrays, each having N/M antenna elements. Tunable lasers provide M optical...
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6549164 |
Distributed adaptive combining system for multiple aperture antennas including phased arrays
A phased array type antenna apparatus compensates for phase and time differences between signals received at different elements of the antenna. Each element within the antenna apparatus has an...
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6535165 |
Phased array antenna beamformer
A method and apparatus for phased array antenna beamforming. An incoming electrical wavefront is received by an antenna. Laser light is amplitude modulated to provide a synthesized optical...
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6529162 |
Phased array antenna system with virtual time delay beam steering
A system and technique for phased array antenna beam steering for transmitting and receiving without sending the waveform through an actual (physical) time delay when a time varying frequency is...
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6496157 |
Reconfigurable antenna device for a telecommunication station
The invention in general terms relates to an antenna device for a telecommunication station, able to transmit or receive a signal and comprising a plurality of radiating elements disposed in a...
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6492958 |
Adaptive antenna reception apparatus
An adaptive antenna reception apparatus includes a reference signal level determination section, reception level detection sections, and beam formers. The reference signal level determination...
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6486829 |
Integrated electronic circuit comprising an oscillator with passive circuit elements
An electronic circuit with at least one active electronic component ( 10 ) and a delay element connected to the component. The delay element comprises an electric conductor ( 13, 18 ) which is...
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6473054 |
Array antennas with notched radiation patterns
A source of interference signals may be present at a fixed incident angle relative to a stationary antenna. Horizontal array antennas are provided with radiation pattern notches or nulls at...
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6459909 |
Distributed cellular telephone antenna system with adaptive cell configuration
A distributed antenna system for use in an in-building cellular telephone network, the system including a base transmission station (BTS), and a distributed antenna for conveying transmissions to...
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6441700 |
Phase shifter arrangement having relatively movable member with projections
This invention discloses an adjustable, relatively small phase-shiftable network for an antenna array, which can be incorporated into a PCB distribution network. The network comprises a PCB...
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6426721 |
Phase control device and system for phased array antenna
A phase control device to control an optical control phased array antenna includes a wavelength splitter to split an input optical signal having multiplexed wavelengths corresponding to at least...
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6411256 |
Reduction of local oscillator spurious radiation from phased array transmit antennas
The present invention is a system and method for reducing the transmission of spurious radiation produced by local oscillators (LOs) in a spacecraft-based phased array antenna. The spurious...
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6388616 |
Simple true-time-delay generator for optical control of phased array antenna
A true time delay system for optical control of a phased array antenna includes a first time delay unit having a pair of parallel end walls having mirrored surfaces facing each other in a zigzag...
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6380908 |
Phased array antenna data re-alignment
A digital phased array antenna data processing system comprises an antenna array having a plurality of antenna elements connected to an analog-to-digital converter for digitizing received signals....
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6356239 |
Method for maintaining instantaneous bandwidth for a segmented, mechanically augmented phased array antenna
A system and method for positioning an electronically scanned, phased array antenna disposed on a moving platform, such as an aircraft, to enable the antenna to remain pointed at, and track, a...
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6337660 |
Fiber optic true time-delay array antenna feed system
The fiber-optic true time-delay array antenna feed is a device for dynamically generating a plurality of identical electromagnetic radiation (EMR) signals with continuously variable time-delay...
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6333712 |
Structural deformation compensation system for large phased-array antennas
A deformation compensation system for use with a large phased-array antenna system to electronically compensate for surface deformations occurring on the phased-array antenna which would otherwise...
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6320539 |
Fiber-optic, wideband array antenna beamformer
This is a technique using a fiber-optic, wideband array antenna beamformer having cascaded, chirped fiber gratings in a distributed architecture based upon the use of cascaded, fiber-optic, chirped...
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6313792 |
Optical control device for electronic scanning antenna
An optical control device for an electronic scanning antenna having at least two controlled radiating elements, and including means for providing first and second mixed light beams, the first light...
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6307506 |
Method and apparatus for enhancing the directional transmission and reception of information
The invention is a method and apparatus for (1) enhancing the transmission of information in a particular direction or (2) enhancing the reception of information from a particular direction by an...
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