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Analysis of Line-Antennas Based on Wavelet Moment Methods

Author: LiangJianWei
Tutor: LiuJianXia
School: Taiyuan University of Technology
Course: Communication and Information System
Keywords: Wavelet Method of Moments Complex wire antenna Axial mode helical Sparse matrix Current distribution
CLC: TN823.13
Type: Master's thesis
Year: 2010
Downloads: 114
Quote: 0
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Abstract


The current distribution characteristics of the wire antenna is usually the basic method of moments analysis. The basic idea of ??the method of moments is the functional equation is discretized into algebraic equations to obtain the solution of the original equation by solving algebraic equations corresponding moments matrix. The discrete matrix formed by the method of moments for a dense matrix for the analysis of large target, such as wire antenna complex geometry, this dense matrix inversion is very time-consuming. The method of moments is its large-scale computing in exchange for high stability and high accuracy of the results. Therefore, from the point of view of computing time, the application of the method of moments by the restrictions. Wavelet analysis a unique vanishing moments, regular and compactly supported nature by selecting suitable discrete basis functions or discrete wavelet analysis to reduce the time of the two-dimensional and three-dimensional problem is solved using the method of moments. So this article is derived using the the Discrete Wavelet moment method for solving the wire antenna electromagnetic integral equation method, and the method of analysis of the current distribution characteristics of several wire antennas. This article in the derivation of the method of moments analysis of wire antenna on the basis of specific methods and steps to do the following work: 1. Based on the method of moments analysis to solve three specific wire antenna; 2. Idea of ??wavelet analysis is applied to wire antenna problem solving, perfected a the wavelet moment method for solving the problem of computational electromagnetics methods and steps through theoretical analysis; wavelet analysis, the first time introduced in the analysis of complex wire antenna on the basic method of moments and wavelet moments The amount of analysis compared the results of the same kind of complex wire antenna. The results show that the wavelet moment method is applied to analyze the current distribution characteristics of arbitrarily shaped wire antennas. Computational complexity line antenna current distribution to solving its input impedance and pattern characteristics parameters, the results demonstrate the effectiveness and feasibility of the wavelet moment method in the analysis of complex wire antenna. This method is not only accurate analysis of the results but also greatly save computation time compared with basic Moments wears. The versatility of this analysis method, the rich computational electromagnetics, theoretical research and engineering applications have important theoretical and practical significance, the wavelet method of moments analysis research and its application has some theoretical reference value for further laid the theoretical basis for the analysis of complex wire antenna transmission characteristics and other EMF-related issues with the wavelet method of moments.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Antenna > Antenna: a variety of structural forms in > Long wire antenna
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