[1]耿瑄,徐金平.R-FDTD与亚网格相结合技术及其应用[J].东南大学学报(自然科学版),2004,34(2):161-165.[doi:10.3969/j.issn.1001-0505.2004.02.005]
 Geng Xuan,Xu Jinping.Reduced finite-difference time-domain method with subgridding and its application[J].Journal of Southeast University (Natural Science Edition),2004,34(2):161-165.[doi:10.3969/j.issn.1001-0505.2004.02.005]
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R-FDTD与亚网格相结合技术及其应用()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
34
期数:
2004年第2期
页码:
161-165
栏目:
电磁场与微波技术
出版日期:
2004-03-20

文章信息/Info

Title:
Reduced finite-difference time-domain method with subgridding and its application
作者:
耿瑄 徐金平
东南大学毫米波国家重点实验室, 南京 210096
Author(s):
Geng Xuan Xu Jinping
State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
关键词:
降维时域有限差分 亚网格 缝隙微带天线 输入阻抗
Keywords:
reduced finite-difference time-domain subgrid microstrip-fed slot antenna input impedance
分类号:
TN011
DOI:
10.3969/j.issn.1001-0505.2004.02.005
摘要:
提出了降维时域有限差分方法(R-FDTD)和亚网格相结合的技术,并应用于微带馈电缝隙天线的分析.首先对微带馈电矩形缝隙天线阻抗特性和辐射特性进行了分析,所得数值结果与有关文献结果一致.与常规的FDTD方法相比,明显地减少了内存需求和计算时间.对工字形和燕尾形缝隙的微带馈电缝隙天线的输入阻抗和方向性图进行了分析计算,得到了工字型和燕尾型缝隙天线结构可以增宽频带、降低谐振频率等对工程设计有参考价值的结论.数值结果表明,采用这种技术可以有效地处理包含细小结构的复杂对象的电磁问题.
Abstract:
A novel approach of reduced finite-difference time-domain method(R-FDTD)combined with subgridding technique is proposed and applied to the analysis of microstrip-fed slot antennas. Firstly, the impedance and radiation characteristic of a microstrip-fed rectangular-slot antenna are analyzed and the obtained numerical results accord with those in literatures. Compared to normal FDTD method, memory requirement and CPU time are reduced obviously by the presented approach. Further more, the input impedance and radiation pattern of a microstrip-fed dumbbell-slot antenna and a microstrip-fed swallow-tailed-slot antenna are calculated. Some useful conclusions, such as the expansion of bandwidth and the reduction of resonant frequency by using swallow-tailed-slot antenna and dumbbell-slot antenna, are deduced for the engineering design. Numerical results show that it is feasible and numerically efficient to solve the electromagnetic problem of complex objects incorporating small features with the proposed approach.

参考文献/References:

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[2] 周永刚,徐金平.减缩时域有限差分法在电磁干扰预测中的应用 [J].东南大学学报(自然科学版),2003,33(4):392-395.
  Zhou Yonggang,Xu Jinping.Application of reduced finite difference time domain method to the prediction of electromagnetic interference [J]. Journal of Southeast University(Natural Science Edition),2003,33(4):392-395.(in Chinese)
[3] Kondylis George D,de Flaviis Franco,Pottie Gregory J,et al.A memory efficient formulation of the finite-difference time-domain method for the solution of Maxwell equations [J].IEEE Trans Microwave Theory Tech,2001,49(7):1310-1320.
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[6] 葛德彪,闫玉波.电磁波时域有限差分方法[M].西安:西安电子科技大学出版社,2002.102-105.
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备注/Memo

备注/Memo:
基金项目: 武器装备预研基金资助项目(51437060101JW0601).
作者简介: 耿瑄(1979—),女,硕士生; 徐金平(联系人),男,博士,教授,博士生导师,jpxu@seu.edu.cn.
更新日期/Last Update: 2004-03-20