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Patent Searching and Data


Matches 701 - 750 out of 2,775

Document Document Title
WO/1997/011508A1
To reduce the transmission power of the serial of a point-to-multi-point radio link system to the minimum and ensure high transmission quality, it generates a characteristic consisting of several sectors (S1...S4), the direction and angl...  
WO/1997/000543A1
A method for forming an adaptive phased array transmission beam pattern at a base station without any knowledge of array geometry or mobile feedback is described. The approach is immune to the problems which plague methods which attempt ...  
WO/1996/042119A1
A receiving system (100) is disclosed which includes at least one antenna (101) providing a plurality of antenna beams. A first processing branch (103) is included for processing a first plurality of signals appearing within a first plur...  
WO/1996/042120A1
A transmitting system (80) is disclosed which includes several antennas (801-803) providing a plurality of antenna beams. The transmit signal from transmitter (81) is sent to the plurality of antennas via routing circuitry (82). The tran...  
WO/1996/037010A1
A device (24) that communicatively couples a number of transmitters and receivers (18) to a number of antennas (28). The device includes transmit ports (TX1, TX2, TX3, TX4) each of which may be connected to a respective transmitter, rece...  
WO/1996/025775A1
Multi-beam antennas (10) with relatively large effective apertures for high antenna gain are provided for tower or pole mounting for cellular and other uses. Low wind resistance is achieved by use of thin cylindrical radiating units (11,...  
WO/1996/023328A1
In a communication system, two multi-beam antennas (20, 20a) laterally spaced from each other each provide coverage of an azimuth sector for receiving signals from a system user. Each antenna provides lower gain performance at regions of...  
WO/1996/023329A1
In a cellular type communication system a sector antenna (12) provides coverage of a sector with a relatively low receive gain. A multi-beam antenna (20) covers the same sector with a plurality of narrower beams (21', 22', 23' and 24') p...  
WO/1996/021164A1
A microwave RF landing system having an airborne transmitter/receiver unit which transmits a pulsed interrogation signal toward a ground based transponder unit which receives the pulsed signal through its non-rotating luneberg lens anten...  
WO/1996/019847A1
An omnidirectional antenna for the microwave range, in particular the millimetric wave range, contains a mode transformer in its feed and/or discharge line made up of rectangular and circular waveguides. The mode transformer transforms t...  
WO/1996/017487A1
A system and method for using a sectored antenna arrangement within a cellular base station to provide redundant coverage within the surrounding cell is disclosed herein. An antenna feed network connects elements of the sectored antenna ...  
WO/1996/017486A1
A base station antenna arrangement is disclosed. In order to overcome the high power requirements of an omni-directional broadcast antenna which allocates a traffic channel to mobile transceivers, the invention provides a base station an...  
WO/1996/007285A1
In a cell of a microwave cellular video distribution system, e.g. a multichannel video distribution system operating at frequencies of around 29GHz or 40GHz, the transmitting antenna is composed of individual antenna sectors (62a, 62b, 6...  
WO1995034997A3  
WO/1995/034997A2
An antenna configuration increases the sensitivity of a base station by providing a plurality of antennas each of which cover a disjunct or partially disjunct area of a larger cell. A receiver for each antenna receives signals transmitte...  
WO1995028747A3  
WO/1995/030254A1
The proposed multiple beam lens antenna comprises a spherical centrally symmetrical lens secured by means of connecting units (3) to an elliptical frame (2) in such a way that the centre of the lens (1) lies outside the plane of the fram...  
WO/1995/028747A2
A communications station for generating or receiving an angularly dispersed array of radiation beams, comprising an array of radiating elements (100) defining an array antenna (1); and a beam former (120), the beam former comprising a pa...  
WO/1995/028016A1
A communications satellite is disclosed which uses distributed multiplexing and demultiplexing so as to minimize the amount of cabling needed between deployable phased array panels and a central processor. Signals are distributed from th...  
WO/1995/028015A1
A system for wireless communication between at least one first station and a plurality of second stations using a relay station is disclosed. The relay station contains, among other features, an antenna array and a multi-channel transpon...  
WO1995022873A3  
WO/1995/022873A2
A transceiver for improving the spectral efficiency and the capacity of cellular communication systems is disclosed. The transceiver uses an antenna array for communicating in a cellular communication system with a plurality of mobile st...  
WO/1995/019078A1
Radiocommunication systems and methods for minimizing co-channel interference are disclosed. The systems and methods are applicable to, for example, landmobile communications (420), satellite communication systems (410) and hybrids (400)...  
WO/1994/013031A1
Two equiangular beams are formed by one antenna plane, and a plurality of planes are combined to generate multiple beams. It becomes possible in this way to make the apparatus compact in size and to reduce the wind pressure against the a...  
WO/1994/002972A1
A superconducting millimeter wave array (10) is disclosed. In one of the preferred embodiments of the invention, the array (10) is enclosed in a cryogenic envelope (16) that has one side that is transparent to microwave radiation. A supe...  
WO/1993/011582A1
Arrangements of compact broadband microstrip antennas are disclosed. Each arrangement comprises a dielectric material (32, 62) with the microstrip antennas mounted to one side and a ground surface (GP) on the opposite side. A first arran...  
WO/1993/009614A1
Beam Compensation Methods pertain to the management of radio beams (11) which are generated by a constellation of satellites (S). These beams (11) are precisely controlled so that they illuminate ''Earth-fixed cells'' as opposed to ''sat...  
WO/1993/009578A1
The Spacecraft Antennas & Beam Steering Methods for Satellite Communication System comprises an advanced active element phased antenna array (10). The present invention utilizes electronic beam steering to provide extremely high gain sig...  
WO/1993/009613A1
The disclosed satellite communication system comprises a dynamic constellation (C) of satellites (S). The system includes a number of low-earth orbiting spacecraft (S) which travel in orbital planes. Each of the individual spacecraft (S)...  
WO/1993/002486A1
A multibeam lens antenna comprises a central symmetry spherical lens (1) with radiators (2) mounted on a unit (3) for securing the radiators and adjusting their position. The central symmetry spherical lens (1) is mounted on a frame (4) ...  
WO/1992/013373A1
The antenna system according to the invention includes a lens (11), which focusses incoming waves (10) at respective focal points (12a-c). Helical feeders (23a-c), which are provided near said focal points (12a-c) and preferably integrat...  
WO/1991/006988A1
The receiving antenna comprises at least two sectors or areas (1, 2) of paraboloids which focus the radiation on their axes (xx') at points F1 and F2 respectively which are offset by an integer of wavelengths of the received radiation. E...  
WO1991001620A3  
WO/1991/001620A2
A multi-element antenna feed method and system which has superior side lobe characteristics over precious electronically scanned beam approaches is provided. A multi-element antenna feed system generally comprises a multi-element antenna...  
WO/1990/009042A1
A patch antenna array having multiple beam-forming capability is formed as a feed network (15) on a lower microstrip substrate with patches (13) overlaying these on an upper substrate. The patch array consists of a number of linear serie...  
WO/1990/006003A1
An angular position determining system utilizing an electronically scanned, linear phased array antenna radar system. The teachings of the present invention are applicable to airborne, ground or sea based radar systems for determining ei...  
WO/1990/005314A1
A system for the transmission of data between a stationary unit and simple mobile unit, with low power consumption, usually located on a vehicle is described. To transmit data from the stationary unit, two carrier waves, polarised, ortho...  
WO/1989/002662A1
A microwave circuit module (20), more particularly an antenna, comprised of a polyethylene foam substrate (22) having a loss tangent less 0.001 and a dielectric constant less than 1.3, a predetermined pattern of one or more elements (24)...  
WO/1988/009066A1
A microwave lens (20) may be used to steer the beam of an array antenna (5) having radiating elements connected by feed lines (9) to array ports (3) of a microwave lens. In order to provide a continuously variable range of steering angle...  
WO/1988/008623A1
A multifunction active array system is disclosed, wherein the array aperture may be partitioned into a plurality of arbitrary subapertures. The array system includes N radiative elements, each coupled to a corresponding active module. Ea...  
WO/1988/008624A1
An active array system with electronic roll stabilization of the difference patterns, and with arbitrary partitioning of the phase scanned aperture with no hardware changes. The array system comprises a large number of radiating elements...  
WO/1988/007770A1
A beam-forming network (98) employs one or a plurality of first transmission delay lines (168, 170, 172, 174) for receiving transmit signals (T1-T4) applied thereto, and a plurality of second transmission lines (176), which serve as line...  
WO1988006808A3  
WO/1988/006808A2
A lens antenna (10) having four phased array apertures (12, 14, 16, and 18) positioned for hemispherical coverage is disclosed. An array of phase shifters (52) is disclosed, each of which is interconnected with four radiating elements (5...  
WO/1988/005609A1
Circular waveguide (12) in which slots are formed which are shaped and disposed such that they interrupt either the right hand or left hand circulating mode (RC and LC respectively) residing in the waveguide (12). Locating the slots in t...  
WO/1988/004837A1
A steerable beam antenna system for use in satellite communication systems and including a main reflector and an antenna array having a plurality of feed elements. The antenna array is positionable at or near at least one focal point of ...  
WO/1988/004480A1
A composite reflector structure (28) for a spacecraft antenna system (20, 50) is formed of a honeycomb material, transparent to electromagnetic radiation, and having inner and outer arcuate surfaces (30, 32) substantially uniformly space...  
WO/1988/004109A1
Radar system using sum and difference signals for tracking targets, wherein the system includes aperture means (10) having a cross sectional area for transmitting energy toward a target and receiving return energy; and circuit means for ...  
WO/1988/002933A1
A launcher (20) of cross-polarized electromagnetic radiation is provided with increased bandwidth by inserting a set of axially directed ridges (50-56) on the interior surfaces of waveguide walls (28-34) of the launcher (20) for concentr...  
WO1988001455A3  

Matches 701 - 750 out of 2,775