Device for optical control of a beam-scanning antenna

Details Device for optical control of a beam-scanning antenna Device for optical control of a beam-scanning antenna

1988-04-11

1989-09-05

Tarcza, Thomas H.

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

Directive

Including a steerable array

342368, 455612, H01Q 322

Patent

active

048643122

ABSTRACT:
Beam-scanning of an antenna by means of microwave phase shifts is achieved by N electrooptical modulators which receive two collinear beams having different frequencies. The modulators define optical paths having different wavelengths. N photodetectors make it possible to receive the beams reflected by the modulators and to control antenna elements during a 2 .pi. phase excursion.

REFERENCES:
patent: 3878520 (1975-04-01), Wright et al.
patent: 4028702 (1977-06-01), Levine
patent: 4238797 (1969-12-01), Shreve
patent: 4241351 (1980-12-01), Shreve
patent: 4258363 (1981-03-01), Bodmer et al.
patent: 4583096 (1986-04-01), Bellman et al.
patent: 4739334 (1988-04-01), Soref
Journal of Lightwave Technology, vol. LT-3, No. 5, Oct. 1985, pp. 992-998, New York, U.S.; R. A. Soref: "Voltage-Controlled Optical/RF phase shifter".
Radar-82, International Conference, Oct. 18-20, 1982, pp. 408-412, London, GB; J. R. Forrest et al: "Optical Fibre Networks for Signal Distribution and Control in Phased Array Radars", p. 441.
Journal of Optics, vol. 15, No. 6, Nov./Dec. 1984, pp. 403-407, Paris, FR; J. P. Goedgebuer et al: "Nouvelle Technique de Modulation Electro-Optique Adaptee aux Sources a Spectre Large".
Levine, Use of Fiber Optic Frequency and Phase Determining Elements in Radar, 5/79 pp. 436-443.

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