为实现发射机大功率的准确测量和有效保护, 详细阐述了定向耦合器的原理、参数标定和功率测量方法, 并以该方法测试已有的发射机输出功率。从测试结果分析得出,该方法具有安装简易、精度高、可动态标定的优点。通过在高频功率源与谐振加速腔之间安装定向同轴耦合器, 经测量标定后, 可实现在线测量出功率源的输出功率、驻波比,将测量结果反馈给控保和监测系统后, 可完成在线大功率测量和设备的可靠控制与保护。

In order to realize accurate power measurement and effective protection of the transmitter, the principle of directional coupler, and the method of parameter calibration and power measurement applied to the RF transmitter system are described. According to the measurements, the method has the advantages of simple installation, high precision, and dynamic calibration. After parameter calibration, the output power and standing wave ratio are measured online by installing a coaxial directional coupler between the RF power source and the resonant cavity. The measurements are then sent to the system of control, protection and monitoring to complete high-power measurement and protection of devices.