高效率有限元素分析法模擬號角天線輻射特性之研究：網格密度重置法

我們建立一套有效且準確的模擬方法，用來模擬分析號角天線的特性。這套方法主要由有限元素分析法（Finite Element Method）搭配模態匹配(Mode-Matching Method)、散射矩陣(Scattering Matrix)與近似隙孔場方法(Approximate Aperture Field Method)，可以用來分析不同形狀連接之波導或任意形狀之號角天線。此外，我們提出一套創新的方法－網格密度重置法(Grid-Density Reset Method)，藉由適當的選取截面之切點密度，可以減少計算時間又不失準確性。

關鍵字

有限元素網格密度；高效率有限元素分析法；號角天線；模態匹配

並列摘要

We develop an efficient method for accurately analyzing properties of horn antennas. The method is based mainly on the finite element method, combined with the mode-matching method, the scattering-matrix method, and the approximate aperture field method. The method can be used to analyze inhomogeneous waveguides or horn antennas with arbitrary cross-section shape. Furthermore, we propose an innovative method, called the grid-density reset method, to properly adapt the grid point distribution over each cross-section of the guide. The grid-density reset method can reduce much computation time without sacrifice of calculation accuracy.

並列關鍵字

horn antenna ； fem grid-density ； efficient finite element method ； mode-matching method

參考文獻

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高效率有限元素分析法模擬號角天線輻射特性之研究：網格密度重置法

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