| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio wave detector that can attempt high accuracy, simplification of assembly work, and cost-cutting and also correspond to an existing apparatus. SOLUTION: Installation parts 12, 13 installing a coil 11, a rectifying diode 14 and a light-emitting diode 15 are patterned by well known forming method in a flexible printed circuit board 10. The rectifier diode 14 and the light- emitting diode 15 are placed with electric connection by soldering in the installation parts 12, 13. The flexible printed circuit board 10, where the coil 10 is formed and the rectifying diode 14 and the light-emitting diode 15 are placed, is inserted into an inside of a tip point of an antenna of a communication apparatus or equipped at an external of it.
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