Automobile antenna

Communications: radio wave antennas – Antennas – With vehicle

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343711, H01Q 132

Patent

active

041609778

ABSTRACT:
By forcing the resonance in the medium-wave spectrum of the electromagnetic loop antenna or antennas formed by a shunting conductor in combination with a series connected capacitor shunting a window opening in an automobile body and coupling to an output conductor through the distributed capacitance and mutual inductance provided by close physical proximity between such output conductor and such shunting conductor, such output conductor terminating at one end in at least one antenna element having electrostatic antenna characteristics, an output signal from the antenna is obtained which exhibits the electrostatic-noise rejection characteristics of a loop antenna and the omni-directional characteristics of a vertical whip-type antenna, while, at the same time, the impedance of the system is compatible with standard radio-tuner input circuits.

REFERENCES:
patent: 2923813 (1960-02-01), Davis
patent: 3066293 (1962-11-01), Davis
patent: 3771159 (1973-11-01), Kawaguchi et al.
patent: 3845489 (1974-10-01), Sauer et al.
patent: 4003056 (1977-01-01), Davis

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