| 摘要 |
A window glass antenna apparatus comprises two antennas exclusively for receiving respective AM and FM radio signals, a first impedance transformer disposed between the antennas and a signal cable for transforming impedance in an AM frequency band from high impedance to low impedance, and a second impedance transformer provided at an output side of the signal cable for transforming impedance in the AM frequency band from low impedance to high impedance. The first impedance transformer includes a primary winding which has one end connected to the AM radio signal receiving antenna, and a tap provided at a primary side thereof and connected to FM radio signal receiving antenna. The second impedance transformer includes a secondary winding which has one end for serving as an AM radio signal output terminal, and a tap provided at a secondary side thereof for serving as an FM radio signal output terminal.
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