用算子理论求解和计算异形波导的截止频率

CALCULATING THE CUTOFF FREQUENCY OF HETEROMOPHIC WAVEGUIDE BY OPERATOR THEORY

该文用矢量偏微分算子理论通过虚拟边界的电场和磁场的匹配求解特殊结构的异形波导的截止频率,这一方法可以精确而方便地求出几乎所有模式的截止频率。本方法也可以计算带脊波导和其它矩形金属加载的异形波导的传播特性。

The cutoff frequency of heteromophic waveguide in special structure is solved with the matching of electric and magnetic field on the invented boundary by vector partial differen-tial operator theory. The method rnay be used to solving the cutoff frequency of almost all of the modes precisely and expediently. The method rnay also be used to calculating the trausmit-ting characteristics of ridged waveguide and other heteromophic waveguide loaded rectaugular metal.