Pseudo-exact simple closed-form solutions for radiation and scattering from thin straight loaded and unloaded wires

Proceedings of the Nineteenth National Radio Science Conference Pub Date : 2002-11-07 DOI:10.1109/NRSC.2002.1022612

M. Fahmy, I. Eshrah

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引用次数: 7

Abstract

A 'fictitious' hypothetical transmission line model is introduced and proved to be extremely useful in the determination of current distribution on thin straight loaded and unloaded wire antennas or scatterers. Thus, all problems of straight wire radiators and scatterers are simply treated in terms of simple transmission line conceptions, yielding simple closed-form solutions. Surprisingly enough, the obtained solutions showed remarkable agreement with the sophisticated moment method solutions except for particular lengths. Besides the expected huge saving in computation time, as compared with moment method solutions, the newly obtained simple closed-form solutions revealed, as well, a simple elegant physical picture of current distribution on straight wire scatterers. Thus while pseudo-exact antenna current distribution comprises one simple standing wave with complex propagation constant, the pseudo-exact current distribution on the unloaded scatterer comprises just two standing waves with complex propagation constant too, besides a third term having direct correspondence to the incident excitation.

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细直载和无载导线辐射和散射的拟精确简单封闭解

本文介绍了一种“虚构的”假设传输线模型，并证明该模型在确定有载和无载薄直线天线或散射体上的电流分布时非常有用。因此，所有直线辐射体和散射体的问题都可以简单地用简单的传输线概念来处理，得到简单的封闭解。令人惊讶的是，除了特定长度外，所得解与复杂矩法解表现出显著的一致性。除了预期的计算时间大大节省外，与矩量法解相比，新获得的简单封闭解还揭示了直线散射体上电流分布的简单优雅的物理图像。因此，伪精确天线电流分布由一个具有复杂传播常数的简单驻波组成，而无负载散射体上的伪精确电流分布除了与入射激励直接对应的第三项外，还包括两个具有复杂传播常数的驻波。

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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Proceedings of the Nineteenth National Radio Science Conference

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