Vehicle antenna apparatus

Details Vehicle antenna apparatus Vehicle antenna apparatus

1999-01-22

2000-05-09

Wong, Don

Communications: radio wave antennas

Antennas

With vehicle

343711, H01Q 132

Patent

active

060610298

ABSTRACT:
A vehicle antenna apparatus that can prevent the antenna gain of each antenna from decreasing owing to the directivity thereof and can obtain stable input power. This vehicle antenna apparatus has a pair of antennas respectively provided in left and right door mirrors, a driving unit, which is connected to the antennas, for changing the orientations of the antennas, and a control unit which is operative to select the antenna, the input power to which is higher than the input power to the other of the pair of antennas, as an antenna for communication and is operative to control the driving unit in such a manner as to drive the pair of antennas so that the orientation of the selected antenna corresponding to higher input power is fixed and the orientation of the other antenna corresponding to lower input power is changed.

REFERENCES:
patent: 4983984 (1991-01-01), Shibano et al.
patent: 5751227 (1998-05-01), Yoshida et al.

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