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应用科学学报 ›› 1994, Vol. 12 ›› Issue (2): 113-119.

• 论文 • 上一篇    下一篇

用频域推进法计算二维导电腔的瞬态响

彭仲秋   

  1. 北京市遥感信息研究所
  • 收稿日期:1992-01-12 修回日期:1992-05-24 出版日期:1994-06-30 发布日期:1994-06-30

CALCULATION OF TRANSIENT RESPONSE OF A TWO-DIMENSIONAL CONDUCTING CAVITY USING MARCHING-ON-IN-FREQUENCY METHOD

PENG ZHONGQIU   

  1. Baijing Research Institute of Remote Sensing Information
  • Received:1992-01-12 Revised:1992-05-24 Online:1994-06-30 Published:1994-06-30

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摘要： 二维导电腔在复频域的积分方程用矩量法求解,空间离散在各取样频率上保持不变,用CGM (共轭梯度法)解矩阵方程。在复频域,系统矩阵的性态得到改善,用基于误差最小化的外推法能产生较精确的初始解,使CGM很快收敛。矩形柱腔的计算结果证实了新方法的有效性。

关键词: 瞬变电磁场, 共轭梯度法, 外推法, 电磁散射

Abstract: The integral equation is handled using the method of momentes in the complex-frequency domain,the space discretization is fixed for all frequencies and the resulting matrix equation is solved by the conjugate gradient method. The condition of the system matrix is improved in the complex-frequency domain. Good initial estimates are obtained using an extrapolation scheme based on error minimization,thereby the conjugate gradient method converges very fast. The transient response is obtained by carrying out the inverse Laplace transfo rmation by an FFT algorithm. The results of a rectangular cylindrical cavity verify the effectiveness of the new method.

Key words: electromagnetie scattering, conjugate gradient method, transient electromagnetic field, extrapolation