| 摘要 |
PROBLEM TO BE SOLVED: To receive a radio wave of an FM radio broadcast wave particularly without an amplifier and an impedance matching circuit regarding a glass antenna provided on the rear window glass of a vehicle such as an automobile. SOLUTION: The antenna is provided in the upper marginal part of an antifogging heating wire on the rear window glass. The antenna comprises: an AM broadcast wave receiving antenna which has multiple horizontal wires arranged at intervals and at least two vertical wires orthogonal to the horizontal wires provided with a space, and regards a position between the vertical wires, and on the uppermost part of the horizontal wire or provided via a drawing line from the part on the uppermost part of the horizontal wire as a first feeding point; and an FM broadcast wave receiving antenna which surrounds the AM broadcast wave receiving antenna by extending from a second feeding point provided above the uppermost part of the horizontal wire of the AM broadcast wave antenna clockwise or counterclockwise along a part of the outermost periphery of the AM broadcast receiving antenna, and is in proximity to as well as capacitively coupled with at least the part of the horizontal wire of the AM broadcast receiving antenna. COPYRIGHT: (C)2009,JPO&INPIT
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