| 摘要 |
A high-frequency receiver has both interference characteristic and reception characteristic. The high-frequency receiver includes an electronic switch that is connected in parallel to input and output terminals of antenna amplifying circuit, and an antenna control unit that controls the electronic switch and an antenna amplifying circuit. When an antenna control signal output from a high-frequency receiving unit is input to the antenna control unit, the electronic switch is opened and simultaneously power supply to the antenna amplifying circuit starts in a weak electric field area, and the electronic switch is closed and simultaneously power supply to the antenna amplifying circuit stops in a strong electric field area.
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