Rigorous Hybrid-Mode Analysis of the Transition from Rectangular Waveguide to Shielded Dielectric Image Guide
Rigorous Hybrid-Mode Analysis of the Transition from Rectangular Waveguide to Shielded Dielectric Image Guide
复制标题
从矩形波导到屏蔽电介质图像波导过渡的严格混合模式分析
DOI：
10.1109/tmtt.1985.1133010
复制
发表时间：
1985
影响因子：
4.3
通讯作者：
F. Arndt
中科院分区：
文献类型：
--
作者：
J. Strube;F. Arndt
采用严格的混合模场展开技术，直接考虑了高阶模耦合效应，也低于相应的截止频率，分析了向屏蔽和介电成像波导过渡的波导。相关特征值问题的解包括具有复传播常数的波，尽管假设波导是无损的。作为频率函数的传播常数的计算图，以及介电常数，说明了在倏逝模式，复波，反向波和传播波之间的复杂模式转换。对于三维散射问题，输入反射系数的计算值与测量值吻合较好，但应用于该结构的传输在线理论会导致错误的结果。
The transition waveguide to shielded and dielectric image guide is analyzed by the rigorous hybrid-mode field expansion technique where higher order mode coupling effects are taken into account directly, also below the corresponding cutoff frequency. The solution of the related eigenvalue problem includes waves with a complex propagation constant although the guide is assumed to be lossless. Calculated diagrams of the propagation constant as a function of frequency, as well as of the permittivity, illustrate the complicated mode conversion between evanescent modes, complex waves, backward waves, and propagating waves. For the three-dimensional scattering problem, the calculated magnitude of the input reflection coefficient agrees well with measurements, whereas the transmission-line theory applied to this structure leads to wrong results.