关键词: 收发前端, 接收通道, 发射通道, 噪声系数, 三阶交调

Abstract:

An important wireless transceiver circuit,the RF transceiver front-end circuit plays a decisive role in overall system noise figure,dynamic range and other key indicators The article makes a detailed analysis of the importance of the RF front-end circuit in a wireless communication system,including the the composition of the RF transceiver front-end,the working principle,and the key points and difficulties in receiver and transmitter design.An optimized design of the key technical indicators is proposed,and a simple UHF high-power RF transceiver front-end design with fast circuit control is presented,which is tested and improved.The results show that the noise figure is up to 3.2 dB And the receiver channel gain is up to 30 dB with a transmit channel output power≥40 dBm and a third-order intermodulation≤-18 dBc.The test results are analyzed,and some improvements on the design are proposed.