用三维抛物方程的CNFD技术计算传播损耗  

The CNFD Technique of 3D Parabolic Equation for Calculating Propagation Loss

作　　者：任明[1] 钱志华[1] 

机构地区：[1]杭州电子科技大学天线与微波技术研究所,杭州310018

出　　处：《电子器件》2013年第1期13-17,共5页Chinese Journal of Electron Devices

基　　金：杭州电子科技大学电路与系统重中之重学科基地开放基金项目(Gk110204003-7)

摘　　要：推导了三维抛物型方程(3DPE)方法的相关计算公式,在此基础上,利用CNFD(Crank-Nicolson Finite-Difference)技术和传统非局部吸收边界条件,采用了矩阵预处理技术处理大规模矩阵,大大改善了计算机存储量的限制状况,同时实现了场值的快速递推。将数值计算结果与双线干涉理论值进行比较,两者吻合很好。A three dimensional parabolic equation（3DPE） method is applied to predict the propagation loss of radio wave. Firstly, the three dimensional parabolic equation is derived. Secondly, the technique of CNFD together with the traditional nonlocal absorbing boundary condition is adopted. In addition, the preconditioned matrix technique is used to handle the large scale matrix equation. Finally, numerical results between the parabolic equation method and two ray theory agree very well.

关 键 词：三维抛物型方程 电波传播损耗 双线干涉 CNFD 

分 类 号：TN011[电子电信—物理电子学]