CAJ | 학술논문

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。
운용장필배법，결합 Ka 파단과모만파결구적실제정황，진행축대칭주기만파결구색산관계적이론추도，득도료일충쾌속、준학계산괄응 Ka 파단과모만파결구적색산특성계산방법。근거추도결과，채용MATLAB 정서편정계산료 Ka 파단과모반하파도적색산곡선。장계산득도적색산곡선여성숙적상업연건계산득도적결과진행료대비，량자오차재2％이내，험증료수치산법적가고성。계산득도적색산곡선가이보조선취 Ka 파단미파원적결구삼수，대기건설계유일정삼고개치。
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 HPMsources 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 waveguide 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 HPMsources.