Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1994-12-19
1997-09-02
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
324 7637, 25022712, 349 65, H01Q 322
Patent
active
056637365
ABSTRACT:
In a broad aspect the present invention comprises a multiple element, multi-throw electronic switch for a fiber optical cable network. The multiple element, multi-throw electronic switch includes a bulk media optical deflector angularly controllable by selectable electronic steering signals. At least one multiple element, multi-throw electronic switch is use to construct a true time delay shifter using rows of a plurality of columns of a plurality of beamsteering optical fiber delay lines, all with a specified antenna scanning coherence center.
Distributed beamsteering is performed by selecting from the composite array, subarrays for which a common steering direction cosine can be applied to that subarray. The distributed beamforming is performed by combining elements beamsteered with a common antenna scanning coherence center from an electronically small core fibers with limited available modes into larger core multimode fibers. The distributed beamsteering and distributed beamforming is iterated until all antenna elements in the composite array have been beamsteered into an array with the identical specified antenna scanning coherence center.
The bulk media optical deflector angularly controllable by selectable electronic steering signals has the additional advantage that a plurality of squint-free antenna beamsteering commands can be simultaneously implemented providing a frequency-independent means of antenna beam shaping which necessary for a frequency-independent monopulse processing capability.
REFERENCES:
patent: 4739334 (1988-04-01), Soref
patent: 5012254 (1991-04-01), Thompson
patent: 5231405 (1993-07-01), Riza
patent: 5345444 (1994-09-01), Clooman et al.
patent: 5440654 (1995-08-01), Lambert
patent: 5448417 (1995-09-01), Adams
"A 1550-nm Millimeter-Wave Photodetector with a Bankwidth-Efficiency Product of 2.4 THz", D. Wake, Journal of Lightwave Technology, vol. 10, No.7 Jul.1992.
"Phased Array Antennas", Edited by Dr. Arthur A. Oliner & Dr. G. H. Knittel--Bandwidth Criteria for Phased Array Antennas, J. Frank; Array Signal Bandwidth pp. 243-253.
"Antenna Theory and Design", Robert S. Elliott, Prentice-Hall, Inc. Englewood Cliffs, New Jersey 07632.
"Ultra-Wideband Microwave Beamforming Technique", Leo Cardone, Microwave Journal, Apr. 1985.
"The First Demonstration of an Optically Steered Microwave Phased Array Antenna Using True-Time-Delay", W. Ng et al., Journal of Lightwave Technology, vol. 9, No. 9, Sep. 1991.
"Phased Array Antennas", edited by Dr. A. Oliner & Dr. G. Knittel--Survey of Time-Delay Beam Steering Techniques, R. Tang, Phased-Array Antennas, pp. 254-260.
"Circular Arrays", D.E.N. Davies, The Handbook of Antenna Design, vol. 1 and 2, Editors A. W. Rudge, K. Milne, A. D. Olver, P. Knight.
Hong John H.
Webb Lance L.
Ginsberg Lawrence N.
Phan Dao L.
Rockwell International Corporation
Silberberg Charles T.
Tarcza Thomas H.
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