Preconditioning Matrix Interpolation Technique for Fast Analysis of Scattering Over Broad Frequency Band

被引：16

作者：

Fan, Z. H. ^{[1
]}

Liu, Z. W. ^{[1
]}

Ding, D. Z. ^{[1
]}

Chen, R. S. ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Dept Commun Engn, Nanjing 210094, Peoples R China

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2010年 / 58卷 / 07期

关键词：

Electromagnetic scattering; fast frequency sweep; impedance matrix interpolation; preconditioning matrix interpolation; sparse approximate inversion (SAI); NONSYMMETRIC LINEAR-SYSTEMS; WAVE-FORM EVALUATION; ELECTROMAGNETIC SCATTERING; IMPEDANCE-MATRIX; MOMENTS; RCS; COMPUTATION; ALGORITHM;

D O I：

10.1109/TAP.2010.2046841

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A hybrid interpolation method is proposed for the fast analysis of the radar cross-section (RCS) over a broad frequency band by use of the matrix interpolation method. In order to efficiently compute electromagnetic scattering, the general minimal residual (GMRES) iterative solver is applied to compute the coefficients of Rao-Wilton-Glisson (RWG) basis functions and the sparse approximate inversion (SAI) preconditioning technique is used to accelerate the iterative solver. Moreover, both the near field impedance and SAI preconditioning matrices are interpolated at intermediate frequencies over a relatively large frequency band with rational function interpolation technique. Therefore, a lot of time can be saved for the calculation of both the near field impedance and preconditioning matrices. Numerical results demonstrate that this hybrid method is efficient for wideband RCS calculation with high accuracy.

引用

页码：2484 / 2487

页数：4

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