计算物理 ›› 2014, Vol. 31 ›› Issue (3): 363-371.

• 研究论文 • 上一篇    下一篇

一种处理Cole-Cole色散媒质的FDTD改进方案

刘广东, 张开银, 范士民   

  1. 阜阳师范学院物理与电子科学学院, 阜阳 236037
  • 收稿日期:2013-06-29 修回日期:2013-10-11 出版日期:2014-05-25 发布日期:2014-05-25
  • 作者简介:刘广东(1972-),男,江苏灌云,博士,副教授,研究方向为电磁散射和逆散射,E-mail:liu_guang_dong@126.com
  • 基金资助:
    国家自然科学基金(61071022,51271059);安徽省自然科学基金(1308085MA13);安徽省科技计划项目(12010302080);阜阳师范学院重点基金(2011FSKJ01ZD)资助项目

A Modified FDTD Scheme for Wave Propagation in General Cole-Cole Dispersive Media

LIU Guangdong, ZHANG Kaiyin, FAN Shimin   

  1. College of Physical and Electronic Science, Fuyang Teachers College, Fuyang 236037, China
  • Received:2013-06-29 Revised:2013-10-11 Online:2014-05-25 Published:2014-05-25

摘要: 对柯尔-柯尔(Cole-Cole)色散媒质的时域有限差分(FDTD)方案尝试给出改进:(1)保留了Cole-Cole经验公式中的静态电导率项;(2)扩展到三维情形;(3)人体乳房组织的模型参数源于实验测量.数值算例结果初步证实改进方案的可行性和有效性.改进方案适用于模拟更一般柯尔-柯尔色散媒质中的电波传播.

关键词: 时域有限差分方法, 色散媒质, 柯尔-柯尔模型

Abstract: For finite-difference time-domain (FDTD) scheme in simulation of electromagnetic wave propagation in Cole-Cole dispersive media. Several improvements are made:(1) preserving a term with static ionic conductivity in Cole-Cole model, which is fit for real Cole-Cole media; (2) extending to three-dimensional (3-D) case; (3) selecting parameters of human breast tissues from experiment. Feasibility and validity of the scheme is preliminarily demonstrated by numerical examples. The modified scheme is propitious to wave propagation in general Cole-Cole dispersive media.

Key words: finite-difference time-domain (FDTD) method, frequency-dependent media, Cole-Cole model

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