Patent ID: 7496063
Filing Date: 2009-02-24
Classification: H03F,H03G,H04B,H04W

Abstract:
1. A time-division multiplexing radio system equipped with a transmitter and a receiver, comprising: a directional coupler arranged at an output side of an amplifier of the transmitter and the directional coupler outputs are coupled with a side to an antenna and a side to the receiver; a reception RF switch arranged at an input side of a frequency converter of the receiver and the reception RF switch are coupled with a side to the antenna and a side to the directional coupler; switchover means for switching over the reception RF switch to the side to the directional coupler under transmission; setting means for setting the receiver so that the receiver receives a signal of a present channel under the transmission; transmission power detecting means for detecting a transmission power of the present channel under the transmission; setting means for setting the receiver so that the receiver receives a signal of an adjacent channel under the transmission; leakage power detecting means for detecting an adjacent channel leakage power under the transmission; and leakage power ratio calculating means for calculating an adjacent-channel leakage power ratio on the basis of the transmission power of the present channel detected by the transmission power detecting means and the adjacent-channel leakage power detected by the leakage power detecting means, wherein: the control means includes means for making the transmitter stop transmission thereof when the adjacent-channel leakage power ratio is lowered than a specified value under the transmission power is kept at a rated value thereof.