Communications: radio wave antennas – Antennas – With ice clearer or preventer
Patent
1992-03-25
1994-08-02
Hille, Rolf
Communications: radio wave antennas
Antennas
With ice clearer or preventer
343713, H01Q 132, H01Q 2130
Patent
active
053349881
ABSTRACT:
A glass antenna for an automobile uses a coil connected directly to a bus for defogging heaters as an FM subsidiary antenna and a T-shaped impedance matching circuit to provide a monotone change of impedance within the FM frequency band. A reverse T-shaped FM main antenna is employed in conjunction with the FM subsidiary antenna to provide a diversity system to enhance receiving sensitivity in entire directions. The T-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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Arisawa Masato
Baba Yuji
Murakami Harunori
Natsume Hirofumi
Niizaki Nobuya
Brown Peter Toby
Hille Rolf
Nippon Sheet Glass Co. Ltd.
Sumitomo Chemical Company Ltd.
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