多層電厚微帶天線的阻抗特性
INPUT IMPEDANCE OF MICROSTRIP ANTENNA WITH THICK MULTILAYER SUBSTRATE
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摘要: 本文提出了一種多層介質(zhì)電厚微帶天線的一種分析方法。從無界空間中的電并矢格林函數(shù)出發(fā),導(dǎo)出了分層介質(zhì)中任意一點具有任意取向的水平電偶極子場的表達式。以此為基礎(chǔ),利用Richmond反作用積分方程,建立了關(guān)于貼片上電流分布的積分方程。通過適當選取電流基函數(shù),使本方法適用于電厚介質(zhì)微帶天線。應(yīng)用Galerkin方法建立矩陣方程。借助于計算機求解該矩陣方程,可得到天線的各項特性。文中用實例進行了驗證。
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關(guān)鍵詞:
- 天線; 微帶天線; 多層介質(zhì)
Abstract: A new method is presented to analyze the multilayer electrically thick circular microstrip antenna excited by a probe. The current on the probe is taken to be uniform. Based on free space electric dyadic Green s function, the field expression of a horizontal electric dipole (HED), which is located in any point of multilayer media and in any direction, has been derived. By using this field expression and Richmond reaction equation, an integral equation of electric current on the patch is formulated. By properly choosing basic function for current expansion, this method can be used for an electrically thick microstrip antenna. The theoretical results are very agree with experimental data for an electrically thick circular microstrip antenna with an air gap. -
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