Because PIN diode has good characteristics that are high breakdown voltage, large controlled power and fast speed of the switch, it applies to the microwave control circuit such as the Microwave Switch, the Phase Shifter, the Amplitude Limiting and the Modulating, etc. 由于PIN管具有可控功率大、损耗小以及开关速度快等特性,广泛应用于调制器,移相器,限幅器及微波开关等微波控制电路中。