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本文提出先用时域有限差分法计算含周期慢波结构的谐振腔的谐振频率和谐振场分布,再基于周期慢波电路色散关系的周期性质,由几个特殊色散点处的频率及波数数值组合出周期慢波线的完整色散关系的新方法。数值计算了同轴波纹波导中TM_(0n)模式的色散关系、耦合阻抗等特性参量。
In this paper, the resonant frequency and resonant field distribution of resonant cavity with periodic slow-wave structure are first calculated by using finite-difference time-domain method. Based on the periodic nature of dispersion relation of periodic slow-wave circuit, the frequency and wavenumber values at several special dispersion points A New Method to Combine the Complete Dispersion Relationships of Periodic Slowwave Lines. The chromatic dispersion relationship, coupling impedance and other characteristic parameters of TM_ (0n) mode are calculated numerically.