Adaptive antenna system for radio waves, in particular for micro

Details Adaptive antenna system for radio waves, in particular for micro Adaptive antenna system for radio waves, in particular for micro

1988-04-27

1989-09-05

Tarcza, Thomas H.

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

Directive

Including a steerable array

370 3, 455612, H01Q 322, H04B 900

Patent

active

048643106

ABSTRACT:
The antenna includes at least one group of antenna elements (EA1, EA2, . . . , EAp). Microwaves emitted by a central emitter (EH) reach a particular element (EA1 for example) by passing through a controllable phase shifter (VE1), a laser (LE1) which modulates a carrier light signal at a frequency specific to said antenna element with the microwaves, via an optical deflector (FIE) which injects said light signal into an optical waveguide (GE) which is common to all of the antenna elements in the group, via an optical deflector (FPE) which directs said light signal to a detector which is specific to said antenna element (EA1), and which reconstitutes the microwaves, and via a microwave amplifier (AE1) which applies the microwaves to said antenna element. The system is applicable to telecommunications and to radar.

REFERENCES:
patent: 3878520 (1975-04-01), Wright et al.
patent: 4198117 (1980-04-01), Kobayashi
patent: 4736463 (1988-04-01), Chauez
Wallington et al., "Optical Techniques for Signal Distribution in Phased Arrays", Gec Journal of Research, vol. 2, No. 2, 1984, pp. 66-75.
Soref: "Voltage-Controlled Optical/RF Phase Shifter", Journal of Lighwave Technology, Oct., No. 5.
Proceedings of the 1979 International Symposium on Circuits and Systems, sponsored by the IEEE Circuits and Systems Society etc., 17-19 Jul. 1979, Tokyo, pp. 735-738; Kiyoshi Nosu et al.: "A Design of Multiplexers for Optical Wavelength-Division Multiplexing Transmission Via a Single Fiber".

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