【作者】 董佳蓉； 魏兵； 李昭敏； 陈萌；

【Author】 DONG Jiarong;WEI Bing;LI Zhaomin;CHEN Meng;Xidian University;

【机构】 西安电子科技大学；

【摘要】 为有效简化复杂电磁问题的数值计算,本文研究了基于DGTD方法的二维表面阻抗边界条件,通过推导电磁场在边界上的表达式,建立了适用于半空间电磁问题的数值框架。为验证本文方法的可行性,将其应用于地-电离层波导传播问题的研究,数值结果显示本文计算结果与传统仿真结果吻合良好,所采用的阻抗边界条件能较好反映真实地面对电磁波传播的影响。本文方法在保证精度的同时降低了模型复杂度和计算资源需求,为大规模地-电离层波导传播仿真提供了高效解决方案。更多还原

【Abstract】 To effectively simplify the numerical calculation of complex electromagnetic problems,this paper investigates two-dimensional surface impedance boundary conditions based on the DGTD method.By deriving the expressions of the electromagnetic field on the boundary,a numerical framework suitable for electromagnetic problems in half-space is established.To validate the feasibility of the method proposed in this paper,it was applied to the study of ground-ionosphere waveguide propagation.Numerical results show that the calculated results obtained in this paper are in good agreement with traditional simulation results,and the impedance boundary conditions adopted can effectively reflect the influence of the real ground on electromagnetic wave propagation.The method in this paper reduces model complexity and computational resource requirements while maintaining accuracy,providing an efficient solution for large-scale ground-ionosphere waveguide propagation simulation.更多还原