Ka波段过模慢波结构色散曲线的数值求解  

Numerical computation of dispersion curves in the Ka-band overmoded slow wave structure

作　　者：武大鹏[1] 舒挺[1] 张华[1] 

机构地区：[1]国防科技大学光电科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2015年第2期28-31,共4页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(11075211)

摘　　要：运用场匹配法,结合Ka波段过模慢波结构的实际情况,进行轴对称周期慢波结构色散关系的理论推导,得到了一种快速、准确计算适应Ka波段过模慢波结构的色散特性计算方法。根据推导结果,采用MATLAB程序编程计算了Ka波段过模盘荷波导的色散曲线。将计算得到的色散曲线与成熟的商业软件计算得到的结果进行了对比,两者误差在2%以内,验证了数值算法的可靠性。计算得到的色散曲线可以辅助选取Ka波段微波源的结构参数,对器件设计有一定参考价值。Backward wave oscillator with over-mode Ka-band high power microwave （HPM） generally outputs mixed TM0n modes, it has high energy conversion efficiency, but it can＇t ensure the purity of output modes. However, it is necessary for high radiation efficiency that the microwave input to the radiation terminal is certain single and pure. So it is hard to put these HPM sources into application. In order to solve this problem, a design method for compact hybrid modes converter of purifying TM0n mixed modes was proposed. With this method, the TM01, TM02 and TM03 mixed modes can be converted into pure circular wavegnide TM01 mode efficiently on the condition of high power capacity and wide wave band. This method also reduces the modes purification difficulty in the design of the HPM sources.

关 键 词：色散曲线 Ka波段过模慢波结构 数值计算算法 

分 类 号：TN12[电子电信—物理电子学]