| 摘要 |
PROBLEM TO BE SOLVED: To provide a glass antenna for a vehicle which provides both antennas for FM and AM broadcasting receiving in the same glass plane of fixed window glass such as rear window glass and side window glass and prevents the drop of especially, the AM broadcasting receiving sensitivity of the window glass antenna connected to a transformer which performs impedance conversion of a received signal from the both antennas. SOLUTION: This glass antenna device 1 for a vehicle is provided with an AM receiving antenna 5 and an FM receiving antenna 3 which are formed on the window glass 2 of an automobile, an AM antenna side impedance converting part 6 and an receiver side impedance converting part 7 at a place other than the window glass 2, a coaxial cable 9 connecting the impedance converting parts, a receiver 8 and a coaxial cable 21 connecting the part 7 and the receiver 8 and can suppress the drop of AM receiving sensitivity by limiting the distributed capacitance of the cable 21.
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