Automobile antenna device
First Claim
1. An automobile antenna device comprising:
- an electrostatic shield case having an opening to face to a metal plate of the automobile body; and
a loop antenna being internally arranged in said electrostatic shield case so that said loop antenna can be facingly provided to said opening in its close vicinity,in order to detect the surface current induced in the surface of the automobile body by broadcasted waves,wherein said loop antenna is equipped with a plurality of loops which are respectively formed by wound antenna wires, and said respective loops are sectorially arranged with one side portions thereof are concentrated in the vicinity of the opening and the other side portions thereof are separately disposed in an approximately same distance.
1 Assignment
0 Petitions
Accused Products
Abstract
An automobile antenna device in which broadcasted waves received by the automobile body is efficiently detected so that the various kinds of receivers equipped with the automobile can be supplied the detected signal. This device comprises an electrostatic shield case which is formed an opening thereat to face to a metal plate of the automobile body and a loop antenna being internally arranged in the electrostatic shield case so that the loop antenna can be facingly provided to the opening in its close vicinity. The loop antenna is equipped with a plurality of loops which are respectively formed by wound antenna wires, and the respective loops are sectorially arranged with the side of the electrostatic shield opening side as their centers.
Therefore, the surface current being induced by the broadcasted waves and flowing in the metal plate of the automobile body can be efficiently detected, and there is no need of pole antenna and others externally exposed, and further, the automobile antenna device can be easily obtained with small sizes and high accuracy.
8 Citations
7 Claims
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1. An automobile antenna device comprising:
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an electrostatic shield case having an opening to face to a metal plate of the automobile body; and a loop antenna being internally arranged in said electrostatic shield case so that said loop antenna can be facingly provided to said opening in its close vicinity, in order to detect the surface current induced in the surface of the automobile body by broadcasted waves, wherein said loop antenna is equipped with a plurality of loops which are respectively formed by wound antenna wires, and said respective loops are sectorially arranged with one side portions thereof are concentrated in the vicinity of the opening and the other side portions thereof are separately disposed in an approximately same distance. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification