网络分解直线法结合周期边界条件分析开域微带结构
ANALYSIS OF OPEN MICROSTRIP STRUCTURES BY USING DIAKOPTIC METHOD OF LINES COMBINED WITH PERIODIC BOUNDARY CONDITIONS
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摘要: 本文用网络分解直线法结合周期边界条件,以平面波激励,通过贴片电流提取相关参数的方法,分析开域微带结构。阻抗元素计算和减缩方程求解,分别使用快速傅里叶变换和网络分解技术,从而大大提高了计算效率。周期边界模拟开域的收敛性研究和计算时间的比较表明了该方法的有效性。最后计算了矩形贴片平面谐振器的谐振频率,其结果与已发表的值吻合很好。Abstract: This paper presents the analysis of open microstrip structures by using diakoptic method of lines combined with periodic boundary conditions (PBC). The parameters of microstrip patch are obtained from patch current excited by plane wave. Impedance matrix elements are computed by using fast Fourier transform (FFT), and reduced equation is solved by using diakoptic technique. Consequently, the computing time is reduced significantly. The convergence property of simulating open structure by using PBC and the comparison of the computer time between using PBC and usual absorbing boundary condition(ABC) show the validity of the method proposed in this paper. Finally, the resonant frequency of a microstrip patch is computed. The numerical results obtained are in good agreement with those published.
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Pregla R, Pascher W. The Method of Lines, in Numerical Techniques for Microwave and Millimeter Wave Passive Structure. T. ltoh, Ed. New York: Wiley, 1989, chapter 6.[2]Dreher A, Pregla R. IEEE Trans. on AP, 1993, AP-41(8): 1363-1368.[3]方大纲,刘次由.二波理论与技术.北京:兵器工业出版社,1987, 1.7.[4]方大纲.微波学报,1991, (4): 7-13.[5]Butler C M. Diakoptic theory and the moment method. IEEE AP-S Digest. Dallas, U. S. A: 1990, 68-71.[6]Bailey M C, Deshpande M D. IEEE Trans. on AP, 1982, AP-30(4): 651-656.[7]Nam S, Itoh T. J. Electromag. Waves Appl., 1988, 2(9): 635-651. -
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