Antenna pattern combiner

Details Antenna pattern combiner Antenna pattern combiner

1977-09-19

1978-12-12

Lieberman, Eli

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

343120, 343876, H01Q 326, G01S 504

Patent

active

041298748

ABSTRACT:
A three input device which accepts signals from a two port antenna system having opposing cardioid patterns, and a third input for a figure eight pattern that is at right angles to the first cardioids. The first antennas cardioids are combined by a zero-phase hybrid combiner into an omnidirectional pattern. This omnidirectional pattern is combined in a second hybrid combiner with the figure eight pattern so that the sum and difference patterns are present at the outputs. These signals are fed to a processor which decodes the front/rear directional information. To decode left/right directional information, switches bypass both hybrid combiners and feed the first antennas basic cardioid patterns directly to the processor.

REFERENCES:
patent: 3521284 (1970-07-01), Shelton et al.

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