超短波通信射频功放保护控制电路设计及应用  

Design and application of RF power amplifier protection control circuit for ultrashort wave communication

作　　者：周湘[1,2] 钟智勇 杜培贤[2] 何放 ZHOU Xiang;ZHONG Zhiyong;DU Peixian;HE Fang(School of Electronic Science an d Engineering,Univ ersity of Electronic Science and'Technology of China,Chengdu 611731,China;Chengdu Yaguang E1ectronics Co.,Ltd,Chengdu 610066,China)

机构地区：[1]电子科技大学电子科学与工程学院,成都611731 [2]成都亚光电子股份有限公司,成都610066

出　　处：《电子科技大学学报》2025年第2期161-165,共5页Journal of University of Electronic Science and Technology of China

摘　　要：结合超短波通信中射频功放的实际工程应用,设计构建了一种复合型功放系统的检测电路及保护电路,并对其功能进行了研究。该设计的检测保护电路能够对脉宽范围50~110μs的信号进行实时监测,对应的占空比为4%~30%,在-35~0 dBm功率范围内对电路做出响应,开关的插入损耗≤2.6 dB,已在最新机载设备上获得应用,对提高功放的可靠性和使用寿命具有积极意义。In recent years,there has been a tendency to increase the output power of radio frequency(RF)tomeet the demands of long-distance communication.RF power amplifiers,serving as the final stage ofcommunication systems,are highly susceptible to damage due to their high power output.Given that poweramplifiers are relatively expensive and delicate components,it is crucial to focus on protecting them during thedesign phase to prevent issues such as overheating,over-temperature,over-voltage,and overloading,which canlead to amplifier failure or malfunction.Combining with the practical engineering applications of RF poweramplifiers in ultra-short wave communication,this paper designs and constructs the detection circuit and protectioncircuit of a composite power amplifier system,and studies their operational capabilities,respectively.The designeddetection and protection circuits enable real-time monitoring of signals with pulse widths ranging from 50μs to110μs,corresponding to the duty cycle 4%to 30%,the circuit power response range−35 dBm to 0 dBm,and theswitch insertion loss£2.6 dB.This circuitry has already been applied in the latest airborne equipment,demonstrating its positive impact on enhancing the reliability and lifespan of power amplifiers.

关 键 词：功率放大器 保护电路 过脉宽 检测 

分 类 号：TN72[电子电信—电路与系统]