Diversity antenna circuit

Details Diversity antenna circuit Diversity antenna circuit

1996-08-26

2000-08-15

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

343725, 343797, 343852, H01Q 2100

Patent

active

061043567

ABSTRACT:
The diversity antenna circuit comprises a first antenna for receiving a vertical plane of polarization of an electric wave, a second antenna for receiving a horizontal plane of polarization thereof, a receiving means for detecting the electric field strength of a received signal, a first matching means for matching the first antenna to the receiving means, a second matching means for matching the second antenna to the receiving means, a first transfer means, a second transfer means, a first switching means, a second switching means, and a switching control means for connecting one of the first and second antennas to the receiving means and separating another one from the receiving means according to ON/OFF control of the first and second switching means based on received electric field strength.

REFERENCES:
patent: 3521284 (1970-07-01), Shelton et al.
patent: 4434425 (1984-02-01), Barbano
patent: 4890118 (1989-12-01), Hudspeth et al.
patent: 5208602 (1993-05-01), Monser et al.
patent: 5294939 (1994-03-01), Sanford et al.
patent: 5486836 (1996-01-01), Kuffner et al.
patent: 5583511 (1996-12-01), Hukderman
R. J. Chignell et al., "Antenna Systems for ESM Applications-Land-Mobile Example," Jul. 1985, pp. 252-256.

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