Improved linear transmission line model for rectangular, circular and triangular microstrip antennas

IEEE Antennas and Propagation Society International Symposium 1997. Digest Pub Date : 1997-07-13 DOI:10.1109/APS.1997.631536

S. Babu, I. Singh, G. Kumar

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引用次数: 9

Abstract

The linear transmission line (LTL) model had been reported for calculating the admittance of a linearly polarized arbitrary shaped patch antenna with symmetrical geometry and constant thickness. In this method, the patch is divided into very small sections along the feed axis length and the width for each section is calculated. However, when this model was simulated and compared for various reported results on rectangular microstrip antennas (RMSA) and circular microstrip antennas (CMSA), an error of around 10% was observed. We propose the following modifications for the reported LTL model. (1) The effective dimensions of the antennas are used instead of physical dimensions to account for the fringing fields. (2) The effective permittivity expression is used to account for the dispersion effect. (3) The characteristic impedance equation was modified to account for the dispersion effect. (4) The effect of probe inductance is taken into account. After incorporating these modifications, the analysis was carried out for the RMSA, CMSA and the equilateral triangular microstrip antenna.

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改进了矩形、圆形和三角形微带天线的线性传输线模型

采用线性传输线(LTL)模型计算了几何对称、厚度恒定的线极化任意形状贴片天线的导纳。在这种方法中，将贴片沿着进给轴的长度分成非常小的部分，并计算每个部分的宽度。然而，当对该模型进行仿真并与矩形微带天线(RMSA)和圆形微带天线(CMSA)的各种报告结果进行比较时，观察到误差在10%左右。我们建议对报告的LTL模型进行以下修改。(1)采用天线的有效尺寸代替物理尺寸来考虑边缘场。(2)采用有效介电常数表达式来解释色散效应。(3)修正了特征阻抗方程以考虑色散效应。(4)考虑了探头电感的影响。结合这些改进，对RMSA、CMSA和等边三角形微带天线进行了分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE Antennas and Propagation Society International Symposium 1997. Digest

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