Automobile antenna system
First Claim
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1. An automobile antenna system comprising:
- a high-frequency pickup which is longitudinally disposed in proximity to and insulated from a marginal edge of a vehicle body of an automobile so as to electromagnetically detect the high-frequency surface currents induced on said vehicle body by broadcast waves;
said high-frequency pickup being provided with a loop antenna consisting of a coil of a plurality of turns on the side facing the marginal edge portion of said vehicle body;
said high-frequency pickup further including a casing fixed to said marginal edge portion of said vehicle body and circuitry provided in said casing, said loop antenna having a spiral coil protruding from said circuitry and being connected thereto.
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Abstract
An automobile antenna disclosed is built in within a vehicle body without any externally protruding portion. It includes an electromagnetic coupling type high-frequency pickup, which has a loop antenna disposed in close proximity to a marginal edge of the vehicle body so as to electromagnetically detect the high-frequency surface currents induced on the vehicle body by external electrical waves.
The loop antenna is formed into a coil of a plurality of turns so that it has a resonance characteristic with respect to frequencies in a broad band by virtue of the self inductance and the parasitic capacitance of the coil.
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Citations
7 Claims
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1. An automobile antenna system comprising:
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a high-frequency pickup which is longitudinally disposed in proximity to and insulated from a marginal edge of a vehicle body of an automobile so as to electromagnetically detect the high-frequency surface currents induced on said vehicle body by broadcast waves; said high-frequency pickup being provided with a loop antenna consisting of a coil of a plurality of turns on the side facing the marginal edge portion of said vehicle body; said high-frequency pickup further including a casing fixed to said marginal edge portion of said vehicle body and circuitry provided in said casing, said loop antenna having a spiral coil protruding from said circuitry and being connected thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification