Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Patent
1995-06-02
1997-02-11
Brown, Peter Toby
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
343853, 343860, 455283, H01Q 2130, H01Q 2300
Patent
active
056025580
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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English Abstract of Japan Kokai Publication #58-069131, Kokai Published Apr. 1983.
Sheffield, Berthold, "Filter Design Simplified", Audio Engineering, Mar. 1951, pp. 13-14 & 34-36.
Arisawa Masato
Baba Yuji
Murakami Harunori
Natsume Hirofumi
Niizaki Nobuya
Brown Peter Toby
Nippon Sheet Glass Co. Ltd.
Sumitomo Chemical Company Limited
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