Electro-optical beamforming network for phased array antennas

Details Electro-optical beamforming network for phased array antennas Electro-optical beamforming network for phased array antennas

1986-09-30

1988-04-19

Blum, Theodore M.

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

Directive

Including a steerable array

342200, H01Q 322

Patent

active

047393343

ABSTRACT:
A fiber optic device 50 designed to steer the radiation beam of a phased-array antenna 10 has been demonstrated. A radio frequency (RF) signal is generated via photomixing at the output of a single-mode fiber optic interferometer. The phase of the electrical signal is shifted over several cycles in direct proportion to a voltage applied to an optical modulator 34, 60. The modulator consists of a Pockels-type optical phase modulator located in one arm of the heterodyne interferometer. Rapid changes in RF phase are feasible. A miniature low-voltage version of the device 50, 72, based upon integrated optics, has been devised.

REFERENCES:
patent: 3878520 (1975-04-01), Wright et al.
patent: 4028702 (1977-06-01), Levine
patent: 4241351 (1980-12-01), Shreve
patent: 4258363 (1981-03-01), Bodmer et al.
patent: 4270847 (1981-06-01), Meyer
patent: 4429954 (1984-02-01), Caulfield et al.
patent: 4583096 (1986-04-01), Bellman et al.
patent: 4620193 (1986-10-01), Heeks

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