| 摘要 |
PROBLEM TO BE SOLVED: To obtain a device capable detecting down interference potential in a transmission band without providing a dedicated antenna for transmission nor a receiver for a transmission band by inputting a received interference potential in a transmission band, converting it into a frequency in a receiving frequency to output it and detecting the converted interference potential. SOLUTION: Down interference potential 31 in a transmission band is inputted to an antenna for transmission 3. The inputted down interference potential 31 in the transmission band is made to pass through a high frequency switch 8 by switching the switch 8 connected to the antenna 3 to the input side of a frequency converting part 9, and subsequently, the part 9 converts a transmission band frequency into a receiving band frequency. The converted potential 31 in the transmission band is made to pass through a high frequency switch 10 by switching the switch 10 to the output side of the part 9 and detected by a receiver 5 for a receiving band. Thus, radio equipment 17 can be miniaturized and a reduction in a cost is also possible. |
