| 摘要 |
PURPOSE: To provide a transmission/reception device which is a frequency division duplex operation system, which does not deteriorate transmission/reception capacity at the time of radio-receiving a signal by a frequency division multiplex system or a time divisional multiplex system, which improves reception sensitivity, which is miniaturized and whose power consumption is reduced. CONSTITUTION: An exterior type antenna radio-transmits/receives a reception signal and a transmission signal, which are frequency-divided/multiplexed. A switching means 120 selects a provided antenna 110 or the exterior type antenna based on the control of a control means 180 and connects the antenna sharing means of a frequency band corresponding to a frequency used for radio transmission/reception between two antenna sharing means 130 and 135. A transmission means 160 transmits the transmission signal of the frequency, which is used for radio transmission/reception, through the antenna sharing means based on the control of the control means 180. A reception means 140 receives the reception signal from the antenna through the antenna sharing means based on the control of the control means 180. |
