| 摘要 |
PROBLEM TO BE SOLVED: To provide a retransmission device which can satisfy provisions for low-power radio stations stipulated by a radio law and also can secure almost equal reception sensitivity performance when a whip antenna used on a receiving terminal is stretched and when it is retracted.SOLUTION: A power feeding unit 6 is disposed at an end of a terminal placement region 21 of an enclosure 2 in which a receiving terminal 50 is placed, and a retransmission antenna 7 is disposed in parallel to a ground pattern 8 of a circuit board 3 and oppositely thereto at a distance from the enclosure 2. This enables the retransmission antenna 7 of a retransmission device 1 and a receiving terminal antenna 52 of the receiving terminal 50 to be electromagnetically firmly coupled, making it possible for the receiving terminal 50 to obtain high reception sensitivity performance. Also, this helps lower the gain of the retransmission antenna 7, making it possible to satisfy provisions for low-power radio stations stipulated by a radio law. |
