基于量热法的大功率毫米波功率测量及校准系统设计

在百千瓦或兆瓦级大功率毫米波系统中一般采用量热法对输出的毫米波功率进行测量。针对百千瓦级长脉冲大功率毫米波系统功率测量的需要,开展了基于量热法的功率测量系统设计,利用吸收负载将入射的毫米波能量转换为热量,通过监测出入水口的温度和流量实现了大功率毫米波功率测量,并开展了重复性测试。为了实现量值溯源,提高测量系统的准确性,开展了能量标准装置的设计,并推导了能量测量误差。

Design of high power millimeter wave power measurement and calibration system based on calorimetry

In the high-power millimeter wave systems of hundreds of kW or MW, the output millimeter wave power is generally measured by calorimetry. According to the needs of power measurement of hundreds of kW long pulse high-power millimeter wave systems, a power measurement system based on calorimetry is designed in this paper. In the proposed design, the incident millimeter wave energy is converted into heat by absorbing load. By monitoring the temperature and flow at the inlet and outlet, the power measurement of high-power millimeter wave is realized, and repeated experiments are carried out. To trace the quantity value and improve the accuracy of the measurement system, the energy standard device is designed, and the system energy measurement error is deduced to calibrate the measurement systems.