| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently attenuate the noise of engine and the like by setting the capacity value of a capacitor to a specified range with respect to a glass antenna device for vehicle, which contains the capacitor where a noise cut filter circuit is connected to a DC power source in parallel. SOLUTION: A noise cut filter circuit 8 for preventing the input of noise to a receiver 7 through a defogger 3 and an antenna conductor 4 when noise occurred from an alternator (generator) and various electrical equipment in an engine room invades into a power line is provided for the glass antenna device. The noise cut filter circuit 8 contains a capacitor 11 which is connected to a DC power source 10 in parallel and the capacity value of a capacitor 11 is set to be 7.0-20.0μF. When it is within the range, several dB noise usually attenuates in a long wave broadcasting band (LW band) compared to a case when the value is out of the range. It is preferable that the inductance value of a choke coil 9 is 2-10 mH.
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