Diversity receiving apparatus

Details Diversity receiving apparatus Diversity receiving apparatus

1992-04-14

1993-06-01

Hille, Rolf

Communications: radio wave antennas

Antennas

Switching between antennas and lines

343853, 343894, 324538, 324542, 4552771, H01Q 3240, H01Q 2300, H01Q 100, G01R 3108

Patent

active

052164349

ABSTRACT:
A diversity receiving apparatus having a plurality of antennas, antenna feeders each being associated with respective one of the antennas, and a single diversity receiving section to which the antennas are connected via the associated antenna feeders. A breakage detecting circuit is included in the apparatus for detecting the breakage of any one of the antenna feeders. The detecting circuit uses an antenna whose radiation element is connected to ground and, by applying a predetermined DC potential to the hot line of the antenna feeder via a resistor, constantly monitors the potential. On the breakage of the antenna feeder, the detecting circuit produces an alarm in response to the resultant change in the potential. The apparatus is capable of readily detecting that the diversity reception effect has been lost and the receiving ability has been degraded due to the breakage of the antenna feeder.

REFERENCES:
patent: 2196590 (1940-04-01), Koch
patent: 3932858 (1976-01-01), Smith et al.
patent: 3940700 (1976-02-01), Fischer
patent: 4268834 (1981-05-01), Henry
patent: 4403343 (1983-09-01), Hamada
patent: 4525869 (1985-06-01), Hamada et al.
patent: 4743887 (1988-05-01), Pothier

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