Optical system for microwave beamforming using intensity summing

Details Optical system for microwave beamforming using intensity summing Optical system for microwave beamforming using intensity summing

1993-07-16

1994-05-10

Blum, Theodore M.

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

Directive

Including a steerable array

342154, H01Q 322, H01Q 324

Patent

active

053111966

ABSTRACT:
An optically based feed structure is used to distribute appropriately phased signals from a central signal generator to the individual elements of a phased array antenna. Any phase can be generated by adding together four phased signals (phased by 90 degree increments) if the amplitudes of the individual phased signals are appropriately controlled. By appropriately controlling the amplitude of the individual phased signals the amplitude of the resultant can also be controlled. In many cases it is desired to keep this amplitude constant. In some cases an amplitude taper across the phased array is desired.

REFERENCES:
patent: 3878520 (1975-04-01), Wright et al.
patent: 4583096 (1986-04-01), Bellman et al.
patent: 4814773 (1989-03-01), Wechsberg et al.
patent: 4885589 (1989-12-01), Edward et al.
patent: 4965603 (1990-10-01), Hong et al.
patent: 5029306 (1991-07-01), Bull et al.

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