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題名 | 線形天線分析之最佳數值收斂行為與饋入模式的研究=A Study of Optimum Numerical Convergence and Feed Modelling for Thin Wire Antennas |
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作 者 | 余政杰; | 書刊名 | 技術學刊 |
卷期 | 12:4 1997.12[民86.12] |
頁次 | 頁623-630 |
分類號 | 448.813 |
關鍵詞 | 電磁理論; 線形天線; 數值收斂行為; 電磁饋入模式; Electromagnetic theory; Thin wire antenna; Numerical convergence behavior; Feed modelling; |
語文 | 中文(Chinese) |
中文摘要 | 線形天線結構簡單易做且廣用廣乏, 如汽車、建築物、船舶、飛機等等之通訊應 用;而常用來分析線形天線之理論有 Pocklington,Hallen,以及 Harrington 等專家所推 導的公式。於應用數值方法分析線形天線時,通常最易困惑的地方有二:一、使用那一公式 可以得到最佳之數值收斂行為,二、使用何種電磁饋入模式可以得到與實驗值最接近的物理 特性;此篇論文之研究主旨即是針對上述兩點所做的努力。 於應用 Pulse Basis 和 Point Match 分析不同天線分式並比較其理論值與 Mack 先生之實驗結果後, Harrington 先生所 推導的公式證明可以得到最佳之數值收斂行為;而當電磁饋入源等效為一環片磁流時,其數 值分析所得到之輸入幅射電導與電納的結果,均證明與實驗值最為相近。 |
英文摘要 | Thin-wire antennas are simple in constructin and seen everywhere on automobiles, buildings, ships, aircrafts, and so on. Among the most commonly used formulas are the Pocklington's, Hallen's, and Harrington's formulations. It is often confusing which formulation shows the best convergence behavior when applied for numerical analysis, and what kind of source model leads to the most accurate numerical simulation when compared to literally available experimental results. This paper is dedicated to clarifying these two points. It was found that Harrington's formulation gives the best convergence behavior as verified by numerically simulating different formulations for wire antennas. It was also shown that both the calculated input conductance and susceptance best fit the experimental results when the excitation source is modeled as a magnetic frill current. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。