Unconditionally Stable TDFEM Algorithm Based on Brick Element

摘要：

　　The basic theory of an unconditionally stable time domain finite-element method(US-TDFEM)based on the brick element is elaborated.Starting from the matrix equation of traditional TDFEM(T-TDFEM),the high-order modes that cause instability are deleted,and a new matrix equation is obtained,and then the iterative calculation is performed in time domain.As a result,the US-TDFEM can use a larger time step that is only determined by the upper frequency of the input signal.The resonant frequencies of the cavity with a small deformation and the cavity filled with a non-uniform dielectric are calculated.The numerical results demonstrate the good performance of this method in the calculation of the resonant frequencies of resonators with fine features.

关键词： unstable modes time step TDFEM resonant frequency

作者: Kaihang Fan Bing Wei Shitian Zhang Xinbo He

作者单位: School of Physics and Optoelectronic Engineering Xidian University Xian,China National Key Laboratory of Electromagnetic Environment China Research Institute of Radiowave Propaga

会议类型: 国际会议

会议名称: The 12th International Symposium Antennas, Propagation, and EM Theory(ISAPE 2018)?(第十二届天线、传播与电磁理论国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 1-4

在线出版日期: 2018-12-03（万方平台首次上网日期，不代表论文的发表时间）