| 摘要 |
PROBLEM TO BE SOLVED: To provide a sensitivity adjustment device, a radio wave communication device, and a wristwatch that can adjust the sensitivity of an antenna such that the sensitivity accords with a use by a simple mechanism while saving power consumption.SOLUTION: The transmission and reception sensitivity of an antenna 13 is adjusted by limiting the transmission and reception direction of a radio wave of the antenna 13 by a radio wave in-out path 31 whose peripheral wall is formed of radio wave shielding bodies 64a, 34b and making the sensitivity adjustment member 32 including a shielding part 32b formed of the radio wave shielding body 34b and an open part 32a operate to open or close by means of adjustment member moving means 33, and thereby changing the degree of opening/closing of the shielding part 32b and the open part 32a relative to a radio wave ingress-egress 31a. This allows power consumption to be reduced, and also improves accuracy of transmission and reception sensitivity control because the transmission and reception direction of a radio wave is limited by the radio wave in-out path whose peripheral wall is formed of the radio wave shielding body. |
