介绍了一种新型利用pin diodes的4输入2输出射频开关的设计,给出了设计思想和详细的电路图,并介绍了这种射频微波器的印刷电路板的设计及其电磁兼容特性。准确分析了器件良好的散射和传输性能。该射频开关稳定性高,微波特性良好,能够准确应用于测试系统中电路的切换。目前,该射频开关已应用于某核磁共振测试系统中,效果良好,可靠性高。 A new type of 4-input 2-output RF switch using pin diodes is introduced. The design idea and the detailed circuit diagram are given. The design of RF circuit board and its EMC characteristics are also introduced. Accurate analysis of the device’s good scattering and transmission performance. The RF switch has high stability and good microwave characteristics and can be accurately applied to the switching of circuits in the test system. At present, the RF switch has been applied to a nuclear magnetic resonance test system, the effect is good, high reliability.