| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio wave detection sensor that comprises a wide band radio wave detection function, capable of detecting even weak radio waves across the frequency band used for a current transceiver, a cell phone, or the like. SOLUTION: The radio wave detection sensor comprises a radio wave detection circuit for detecting radio waves, and a comparison circuit that outputs a radio wave detection signal if detection of radio waves is confirmed by comparing the output signal from the radio wave detection circuit to a set threshold. The radio wave detection circuit is provided with an emitter follower circuit of a PNP transistor in which a collector is formed as a substrate or connected to a substrate, an emitter is connected to a power supply through an emitter resistor, and a base acts as an input side. The radio wave detection circuit is connected directly or indirectly to one or a plurality of antennas. The detection band of a radio wave is set by combining a form of the antenna that corresponds to the detection band for a radio wave with a connection mode for the radio wave detection circuit of the antenna. COPYRIGHT: (C)2004,JPO&NCIPI
|
