十腔双端双环磁控管谐振腔模拟和实验研究

Simulation and Experiment Research on 10-vane Strapped Magnetron Oscillators

采用三维粒子模拟软件(Magic3D)对10腔双端双环磁控管谐振腔进行了模拟和实验分析,冷测模拟主要分析了п模及其相邻模式在各截面上的电磁场分布特性,计算得到的模式分隔度达80%,有栽品质因数为167。热测模拟中采用的阳极电压和外部轴向磁场强度分别为3.95kV和0.18T。模拟得到п模式工作频率为2.45GHz,阳极电流为0.35A,输出功率为1000W左右,其输出效率达到72.3%。研究表明,模拟结果与实验测试基本一致,证实了本方法对磁控管的工程设计和优化具有较强的指导意义。

Both cold and hot test simulations for 10-vane strapped magnetron oscillators are analyzed using three dimensional particle-in-cell code (PIC). In the cold simulation, the electromagnetic distribution forπmode and the adjacent modes in every section, as well as the mode separation and the load quality factor are studied. The mode separation reaches 80 % and the load quality factor is 167. In the hot test simulation,the anode voltage and the external axial magnetic field are 3.95kV and 0.18T,respectively. Throughout the simulation,the operation frequency is 2.45GHz, the anode current was 0.35A, the output power is about 1 000W, and the efficiency reached 72.3%. The simulation results is found to be in agreement with the experimental results. This is an useful method to optimize the engineering of magnetrons.