Automobile antenna system

Details Automobile antenna system Automobile antenna system

1986-01-30

1988-05-03

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

With wave collector

455278, 343703, 343713, 343876, H04B 700, H01Q 132

Patent

active

047425679

ABSTRACT:
An automobile antenna system composed of two antennas are attached to the rear windshield of a vehicle body. A high-frequency pickup is provided on the front pillar of the vehicle body for detecting the lowering of the output level of the main antenna in advance, and an antenna selecting signal generator actuates a switch circuit so that the main antenna, the output level of which is predicted to dip after a predetermined lapse of time, is changed over to the sub antenna, in which no dipping is occurring, whereby the output level of the diversity-reception antenna is maintained at a predetermined value or higher even when the vehicle drives into an area where stationary waves are being produced.

REFERENCES:
patent: 4079322 (1978-03-01), Lawrence et al.
patent: 4167738 (1979-09-01), Kirkencall
patent: 4499606 (1985-02-01), Rambo
patent: 4566133 (1986-01-01), Rambo
patent: 4633519 (1986-12-01), Gatoh et al.

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