| 摘要 |
PROBLEM TO BE SOLVED: To check high frequency RF characteristics of a transmission section without being affected electrically by an antenna by throwing a 1st switch to electrically connect a reception section to the antenna and throwing a 2nd switch to electrically connect the transmission section to the antenna. SOLUTION: A 1st terminal T4 is connected to a 3rd terminal T6 electrically by a 1st switch S2 and a 2nd terminal T5 is connected to a 4th terminal T7 electrically by a 2nd switch S3. As a result, a transmission section 9 is connected electrically to an RF connector 21 and a reception section 8 is connected electrically to an antenna 11. In this case, an electric circuit when viewing a transmission section 9 from a plug section is electrically isolated from an electric circuit when viewing the reception section 8 from the antenna 11. Thus, the impedance of the one electric circuit is not affected by the other electric circuit and kept to be, e.g. 50 ohms. |
