標題: Application of two-dimensional nonuniform fast Fourier transform (2-D NUFFT) technique to analysis of shielded microstrip circuits
作者: Su, KY
Kuo, JT
電信工程研究所
Institute of Communications Engineering
關鍵字: method of moments (MoM);nonuniform fast Fourier transform;spectral-domain approach (SDA)
公開日期: 1-Mar-2005
摘要: A two-dimensional nonuniform fast Fourier transform (2-D NUFFT) technique is developed for analysis of microstrip circuits in a rectangular enclosure. The 2-D Fourier transform of a nongrid point is approximated by Fourier bases in a square neighborhood with (q + 1) by (q + 1) grid points. The square neighborhood can be reduced to an octagonal region with q(2)/2 + 3q + 1 grid points without sacrificing accuracy if q is sufficiently large. This technique allows an arbitrary discretization scheme on conductors and shows a great flexibility for the analysis. Asymmetric rooftop functions are inevitably used to expand surface current densities on conductors. Based on the spectral-domain approach, all elements of the final method-of-moments matrix are double summations of products of a weighted Green's function and trigonometric functions. By using the proposed technique, the double summations at all sampled points can be obtained via the 2-D NUFFT. The scattering parameters of a compact miniaturized hairpin resonator, an interdigital capacitor, and a wide-band filter are calculated. The-calculated results show good agreement with measurements.
URI: http://dx.doi.org/10.1109/TMTT.2004.842475
http://hdl.handle.net/11536/13928
ISSN: 0018-9480
DOI: 10.1109/TMTT.2004.842475
期刊: IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume: 53
Issue: 3
起始頁: 993
結束頁: 999
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