- 作者: 吳瑞北;陳俊雄
- 作者服務機構: 國立臺灣大學電機工程學系
- 中文摘要: 本論文旨在提出平面波頻譜分析法,以探討各向異性不勻板狀介質之電磁特性。首先從線性系統的觀點,考慮任意斜向人射平面波引入此介質的電波傳播問題。接著經由變分互作用理論求出電磁場須滿足的變分公式,並利用有限元素法及鋒面推進法求解反射場及透射場。最後則就所得反射係數的平面波頻譜,來討論由此引出的各種電磁特性,如時間延遲、空間挪移、波束群速、天線場型、及導波常數等。
- 英文摘要: An approach based on plane-wave spectrum and linear system viewpoint is proposed to investigatethe reflected and transmitted waves from an inhomogeneous and anisotropic slab which is illuminated byarbitrary incident waves. In this study, the governing variational formula is achieved via the variationalreaction theory and solved by the finite element method together with the frontal solution technique. Thereflection and transmission coefficients thus obtained are finally applied to depict various electromagneticphenomena such as the time delay, lateral shift, group velocity, far field pattern, and guided propagationconstants.
- 中文關鍵字: plane-wave spectrum; variational formulation; finite element method; anisotropic slab; time delay; lateral shift; printed antenna; far-field pattern; dielectric waveguide
- 英文關鍵字: --