Reversible time delay beamforming optical architecture for phase

Details Reversible time delay beamforming optical architecture for phase Reversible time delay beamforming optical architecture for phase

1991-04-24

1992-05-26

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

342158, H01Q 322

Patent

active

051172399

ABSTRACT:
A phased array antenna system has optical architecture comprising free space delay units and associated spatial light modulators compatible for operation with temporally incoherent or coherent laser light to produce signals having selected time delays to actuate antenna elements of an antenna array to transmit electromagnetic radiation at a selected beam angle from the phase array. The same optical architecture is used to process electromagnetic signals detected by the antenna array to produce an output signal for display or processing which corresponds to the radiation detected at the selected beam angle.

REFERENCES:
patent: 4929956 (1990-05-01), Lee et al.
D. Dolfi, F. Michel-Gabriel, S. Bann, J. P. Huignard, "Two-Dimensional Optical Architecture for Time-Delay Beam Forming in a Phased-Array Antenna", vol. 16, Optics Letters, pp. 255-257 (Feb. 15, 1991).
D. Dolfi, J-P Buignard, M. Baril, "Optically Controlled True Time Delays for Phased Array Antenna", SPIE vol. 1102-Optical Technology for Microwave Applications IV (1989).
E. N. Toughlian, H. Zmuda, "A Photonic Variable FR Delay Line for Phased Array Antennas", IEEE Manuscript Report #0733-8724/90/1200 (1990).

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