平板介質(zhì)波導(dǎo)不連續(xù)性問(wèn)題的有限元分析
FINITE-ELEMENT ANALYSIS OF PLANAR DIELECTRIC WAVEGUIDE DISCONTINUITIES
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摘要: 本文應(yīng)用有限元、模匹配和多模網(wǎng)絡(luò)相結(jié)合的方法,分析了平板介質(zhì)波導(dǎo)不連續(xù)性結(jié)構(gòu)的散射及輻射特性。與常規(guī)的從場(chǎng)源關(guān)系出發(fā)來(lái)分析輻射問(wèn)題的方法不同,本文方法從求解介質(zhì)波導(dǎo)結(jié)構(gòu)的色散特性入手,從散射的角度將輻射問(wèn)題轉(zhuǎn)化為表面波和空間波的傳輸問(wèn)題,從而使分析過(guò)程得到了很大的簡(jiǎn)化。
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關(guān)鍵詞:
- 有限元; 模匹配; 多模網(wǎng)絡(luò); 平板介質(zhì)波導(dǎo)
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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