網(wǎng)絡(luò)分解直線法結(jié)合周期邊界條件分析開域微帶結(jié)構(gòu)
ANALYSIS OF OPEN MICROSTRIP STRUCTURES BY USING DIAKOPTIC METHOD OF LINES COMBINED WITH PERIODIC BOUNDARY CONDITIONS
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摘要: 本文用網(wǎng)絡(luò)分解直線法結(jié)合周期邊界條件,以平面波激勵,通過貼片電流提取相關(guān)參數(shù)的方法,分析開域微帶結(jié)構(gòu)。阻抗元素計算和減縮方程求解,分別使用快速傅里葉變換和網(wǎng)絡(luò)分解技術(shù),從而大大提高了計算效率。周期邊界模擬開域的收斂性研究和計算時間的比較表明了該方法的有效性。最后計算了矩形貼片平面諧振器的諧振頻率,其結(jié)果與已發(fā)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]方大綱,劉次由.二波理論與技術(shù).北京:兵器工業(yè)出版社,1987, 1.7.[4]方大綱.微波學(xué)報,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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