Reception system.

摘要

An inductance element (L1) is arranged to parallel resonate with a ground stray capacitance component (C2,C3) of an antenna on a motor vehicle and a feeder cable (7) to a radio receiver tuner (21). Matching means (L2) is provided to compensate for a Q-factor of the parallel resonance for improving a reception gain over a wide range in a reception band. The matching means may be a low pass filter (23). The parallel-resonance circuit inductance may be provided wholly by choke coils (11a, 11b) in power leads (12, 13) of a heater circuit in which the antenna (2) is formed by a plurality of heater wires on a vehicle window (1).