介绍了一种重复频率脉冲磁场作为高功率微波源的导引磁场的设计, 该磁场电源具有功耗低、发热量小、结构紧凑等优点, 符合高功率微波朝重复频率方向发展的需求。从产生脉冲磁场的电流表达式出发, 根据涡流损耗不能太大、品质因数要高和电容储能要小的原则, 给出了脉冲磁场产生系统的储能电容和充电电压的优化设计方法。最后将此方法应用于Ka波段返波振荡器导引磁场的设计, 确定出产生脉冲磁场电路的电容和充电电压的值, 并进行了仿真和实验研究, 结果与理论要求吻合较好, 在重复频率10 Hz条件下能稳定运行, 验证了设计的合理性。

A repetitive pulsed magnetic field serving as the guiding magnetic field for the repetitive high-power microwave source has been proposed, which makes the source compact with low loss and small heat. The design started from the expression of the current producing the pulsed magnetic field, and was based on the following principles: low eddy current loss, small capacitive energy storage and large quality factor. The optimization method of the storage capacitor and charging voltage of the field producing system was presented. Applying this method to the design of a Ka-band back-wave oscillator(BWO), the circuit parameters were determined, corresponding simulation and experiment were conducted, and the measured results accorded with the calculated requirements. The BWO worked steadily at a rep-rate of 10 Hz, validating the rationality of the design．