Tracking system for multiple beam antenna

Details Tracking system for multiple beam antenna Tracking system for multiple beam antenna

1976-05-17

1977-08-16

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343113R, G01S 502

Patent

active

040429318

ABSTRACT:
A tracking system for use with an antenna having a multiple beam radiation pattern for sensing the direction of radiant energy incident upon the antenna. Pairs of the beams are selectively coupled to a monopulse comparator comprising a pair of hybrid couplers interconnected by a fixed phase shifter providing 90.degree. phase shift and by a pair of variable phase shifters providing phase shifts of equal magnitude but opposite sign. The output of the second hybrid coupler provides monopulse sum and difference signals. A sensing circuit responsive to the sum and difference signals operates the variable phase shifters to steer a null between the selected pair of beams.

REFERENCES:
patent: 3176297 (1965-03-01), Forsberg
patent: 3967279 (1976-06-01), Zeger

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