RADIO RELAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a radio relay device capable of performing radio communication between a radio device installed in the ground without mediating a manhole cover and one installed on the ground, and capable of raising a radio signal level transmitted to the ground surface side.

SOLUTION: The radio relay device is used upon radio communication between a radio device 5 installed in the ground at an installation position of a manhole cover 3 and a radio device installed on the ground. A body of the radio relay device includes a reflector 10a that reflects an electric wave radiated from the radio device 5 toward the rear surface side of the manhole cover 3 toward a predetermined position (specific position P) on the ground surface around the manhole cover 3.

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