平板介质波导不连续性问题的有限元分析
FINITE-ELEMENT ANALYSIS OF PLANAR DIELECTRIC WAVEGUIDE DISCONTINUITIES
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摘要: 本文应用有限元、模匹配和多模网络相结合的方法,分析了平板介质波导不连续性结构的散射及辐射特性。与常规的从场源关系出发来分析辐射问题的方法不同,本文方法从求解介质波导结构的色散特性入手,从散射的角度将辐射问题转化为表面波和空间波的传输问题,从而使分析过程得到了很大的简化。Abstract: The finite element method is combined with the mode-matching method and the multi-mode network theory to analyze the scattering and radiation characteristics of a class of planar dielectric waveguide discontinuities. Unlike the conventional method to treat the radiation as a source-field problem, in the present approach, the dispersion characteristics of dielectric guidedwave structures are calculated first, and then the radiation problem is transferred to the propagation problem of a series of surface-waves and space waves from the viewpoint of scattering, thus the analysis is tremendously simplified.
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