Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Patent
1993-09-17
1995-06-27
Urban, Edward F.
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
4552341, 455291, 455293, 455345, H04B 118
Patent
active
054288304
ABSTRACT:
A concealed antenna system for motor vehicle radios replaces a radio chassis preamplifier with a remote radio frequency amplifier packaged with a filter module adjacent the antenna conductors to reduce the noise floor before transmitting the signal by a highly capacitive cable to the radio chassis. The dynamic range of the antenna system is improved by an automatic gain control feedback signal from the radio chassis to the RF amplifier so that the gain of the amplifier is reduced in the presence of a strong AM signal. Preferably the antenna conductors comprise embedded conductors in an insulating panel of a motor vehicle such as the vehicle rear window, and the AM conductor may be conveniently provided by the heater grid for the window panel.
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Zerod, Richard D., "Advances in Concealed AM/FM Antenna System Design", SAE Technical Paper Series No. 930952, presented at Int'l Congress & Exposition, Det., Mich., Mar. 1-5, 1993.
Movahhed Mohamman-Reza S.
Tannery, IV George F.
Zerod Richard D.
Ford Motor Company
May Roger L.
Mollon Mark L.
Pham Chi H.
Urban Edward F.
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