UHF大功率收发前端设计

Design of High-Power UHF Front-End

射频收发前端电路是无线收发信机的重要电路之一,它对整个系统的噪声系数,动态范围等关键指标起决定性作用。文中具体分析了射频前端电路在无线通信系统中的重要性、射频收发前端的组成、工作原理、接收和发射部分的设计难点和重点。对关键技术指标进行了优化设计。设计了思维简洁、电路控制速度快的UHF大功率射频收发前端,并对方案进行试验改良。通过实验结果表明,该电路噪声系数达到3.2 dB,接收通道增益达到30 dB。发射通道输出功率≥40 dBm,三阶交调≤-18 dBc,试验结果达到预期目标。最后结合实际测试曲线,对实验结果进行进行了分析,并对现有方案提出了改进。

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 im- portance 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 powers≥40 dBm and a third-order intermodulation≤ -18 dBc. The test results are analyzed, and some improvements on the design are proposed.