Antenna circuit
专利汇可以提供Antenna circuit专利检索，专利查询，专利分析的服务。并且PURPOSE:To prevent a signal in the medium wave band from being introduced as mutual modulation distortion, by suppressing the level of a radio waves picked up by an external antenna in the medium wave band lower than the level in the short wave band, and transmitting the level as it is to a high frequency amplifier in the short wave band. CONSTITUTION:The output terminal of a rod antenna 1 drops the signal gain of the medium wave band in a resonance circuit 9 constituted of the equivalent capacity of a capacitor 5, a coil 6, and an antenna and the input capacity of an FET11. The resonance circuit 9 has resonance frequency f1, f2 and the induced voltage of the antenna is e1 in case of the short wave band, and e2 in case of the medium and long wave bands. The output terminal of the circuit 9 acts as a filter is connected to the base of the FET11 through a high pass filter 10 to remove signals in a VHF band more than that in the short wave band and the output is outputted from an output terminal 15 through a series circuit consisting of coils 13, 14.，下面是Antenna circuit专利的具体信息内容。
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