【摘要】 目前射频单刀双掷开关是射频控制电路的基本器件,其主要作用是控制射频微波传输系统中微波信号的通断。经常被应用于诸如微波信号源用的脉冲调制器,以及目前公网RRU中的驻波检测与DPD校准侧,通过切换开关,实现驻波检测以及DPD校准等功能,特别是对于TDD系统而言,大功率的射频开关可以起到Tx和Rx之间的切换,实现系统设计。可见目前射频开关在通信系统中扮演者重要的角色。本文首先通过详细的分析PIN二极管的各项参数性能,并在此基础上,分析了PIN开关的理论分析方法。通过以上分析建立一个PIN单刀双掷开关,通过仿真,各项指标良好。更多还原

【Abstract】 The RF single pole double threw( SPDT) is the basic device to control circuit,the role is to control the microwave signal of transmission system off. It is typically used in pulse modulator of microwave signal source,and to accomplish VSWR detection and DPD alignment,especially used in the TDD systems,the high power SPDT using as a switch to the system from Tx to Rx,or else. So it plays an important role in the communication systems. This paper presents a SPDT switch design process. Firstly,the PIN diodes parameters,the theory of PIN switch and circuit model are analyzed. A PIN SPDT switch is designed based on this,as the simulation shows that the parameters of SPDT has good characteristics of low insertion loss and high isolation.更多还原