Glass antenna system for automobile

Details Glass antenna system for automobile Glass antenna system for automobile

1996-06-03

1997-12-16

Hajec, Donald T.

Communications: radio wave antennas

Antennas

With vehicle

343850, 343860, 333 32, H01Q 132, H01Q 150

Patent

active

056990715

ABSTRACT:
A glass antenna system for an automobile comprises a T-shaped or pi-shaped dynamic impedance matching circuit. Another system comprises an integrated circuit consisting of T-shaped FM and AM matching circuits each connected to a common cable. The T-shaped or pi-shaped matching circuit comprises at least two varactor diodes each applied to a channel selection voltage to match the FM antenna impedance with that of the FM receiver including that of the transmission cable.

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Sheffield, Berthold, "Filter Design Simplified", Audio Engineering, Mar. 1951, pp. 13-14 & 34-36.

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