| 摘要 |
PROBLEM TO BE SOLVED: To attain a speech, as well as in a communication area of a relay base station of a mobile telephone system, even at such a location where a speech by the use of a portable telephone set is impossible like in a building or under the ground. SOLUTION: The telephone set is provided with a master set 16 having an external reception antenna 10, a transmission antenna 11, an internal reception antenna 13 and an internal transmission antenna 14, and connection terminals to connect cable terminations extended from each antenna. A filter passing only a radio wave from a relay base station and an amplifier amplifying the radio wave are connected between a connection terminal of the external reception antenna 10 and a connection terminal of the internal reception antenna 13 in the master set 16, and a connection terminal of the external transmission antenna 11 and a connection terminal of the internal transmission antenna 14 are connected together directly. |
