| 摘要 |
PURPOSE:To reduce power loss by selecting the connection state of a common contact point of a 1st switch interlocking with the connection state of a common contact of a 2nd switch when the 2nd switch is connected to a 2nd internal antenna. CONSTITUTION:When a 2nd antenna 5 of a 2nd reception section 3 is used, a common contact 9c of a 2nd switch 9 is thrown to the position of a fixed contact 9a and a transmission reception signal passes through a signal line A attended with the signal transmission reception in the antenna 5. A DC voltage from a high frequency suppression filter 15 is superimposed on an AC voltage and the superimposed signal is supplied to the signal line A. The AC component of the signal line A is cut off by the high frequency suppression filter 14 and the DC voltage component is applied to a 1st switch 18 at a 1st reception section via a signal line B and a common contact 18c of the switch 18 is thrown to the position of a contact 18a. Thus, a reception signal of the 1st antenna 4 is inputted to a front end 10 via the switch 18 and the reception section 2 is in the receiving state of the reception signal of the antenna 4. |
