Window glass antenna system

Details Window glass antenna system Window glass antenna system

1997-05-15

1999-05-25

Wong, Don

Communications: radio wave antennas

Antennas

With vehicle

343860, H01Q 132

Patent

active

059073080

ABSTRACT:
A window glass antenna system includes a defogging heater pattern disposed on a window glass pane and being operable also as an AM broadcast receiver antenna, an impedance matching circuit having two inductors for respectively causing series resonance and parallel resonance of AM broadcast signals fed from an output of the heater pattern and being designed to supply the AM broadcast signals to an associated radio receiver, and at least one capacitor disposed between the heater pattern output and the impedance matching circuit for blocking induced noises of AM frequency band. With this arrangement, it becomes possible to significantly attenuate noises of AM frequency band to be induced into the heater pattern, without attenuating received signals of AM broadcast, whereby AM broadcast radio reception of good S/N ratio is enabled.

REFERENCES:
patent: 5239302 (1993-08-01), Maeda et al.
patent: 5334988 (1994-08-01), Murakami et al.
patent: 5654721 (1997-08-01), Saitou et al.
patent: 5719585 (1998-02-01), Tabata et al.

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