臺灣博碩士論文加值系統

本篇論文詳細地探討了金屬導體的厚度對共面波導之色散特性與漏波模態
的效應.我們首先利用電磁場的網路分析法(network analytical
method),這是一種頻譜域分析法(spectral domain approach)的延伸,用
以考慮金屬導體的厚度,以推導出在頻譜域的積分方程式.然後利用數值分
析方法 Galerkin's method,我們就可以解出共面波導結構的複數傳播常
數,即可求即可求出共面波導的傳輸特性,即等效介電常數以及衰減常數.
數值結果顯示,介電質基底層的厚度,是影響漏失衰減中最主要的參數.而
調整中央金屬帶或溝槽的寬度,兩者對漏失衰減的影響則差不多.同時,隨
著金屬導體厚度的增加,漏失衰減的值也會增大.

In this study, the effects of finite metalization thickness on
dispersion characteristics and leaky waves of coplanar
waveguides are presented and discussed in detail. We first
derive the spectral domain integral equations by using network
analytical method, an extension of spectral domain approach, to
take metalization thickness into account. By applying the
Galerkin's procedure to these integral equations, we can solve
the complex propagation constant of this coplanar waveguide
structure. Thus, the transmission characteristics of the
coplanar waveguide can be obtained, i.e., effective dielectric
constants and normalized attenuation constants. Numerical
results show that the normalized attenuation constant varies
significantly with the dielectric substrate thickness. Changing
the center strip width or the slot width has similar influence
on the normalized attenuation constant. The normalized
attenuation constant is found to increase with increasing
metalization thickness.