| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio wave detection device which does not require confirmation of the non-existence of a bugging device, as well as by another means in advance, regardless of the modulation system of the bugging device. <P>SOLUTION: This radio wave detection device determines the existence of bugging radio waves, when the intensity of a radio wave received by an antenna installed inside a room is stronger between each intensity of the radio waves received by at least one or more antennas, installed respectively inside and outside the room. The device has: an antenna-switching part for selecting and outputting either of signals outputted from antennas installed on the inside and the outside; a wideband reception part for receiving the selected signal; a reception control part for controlling the reception frequency and the band width of the wideband reception part; a received signal processing part for digitizing and storing the intensity of the received signal; a means for comparing the digitized signal intensity, with each intensity of the radio waves received by an antenna installed on the inside and an antenna installed on the outside; and a means for determining the existence of a wiretapping radio wave, when a comparison result agrees with a condition determined, in advance. <P>COPYRIGHT: (C)2010,JPO&INPIT |
