| 摘要 |
PURPOSE: A pattern structure and receiver circuit for vehicle glass antenna is provided to remove noise and improve sensitivity by receiving only the AM frequency band, while achieving improved sound quality. CONSTITUTION: An FM pattern(1) and an AM pattern(2) are formed separate, the AM pattern is positioned beneath a rear window and a tuning bar is formed at the top of the FM pattern. A high pass filter(HPF)(5) or a band pass filter(BPF) is connected between the FM pattern and an RF-OUT unit(4). An AM input constant voltage circuit unit(7), a surge protector unit(8), a high pass filter(HPF) unit(9), an FET amplifier unit(11) connected to a power unit(10), an LPF unit(12) and an AM output match circuit unit(13) are connected in sequence between the AM pattern and the RF-OUT unit.
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