摘要
本文用箱式格式的有限差分法求解了电磁波在对流层中传播的抛物化波动方程。文中给出了该隐式格式的相容性、稳定性以及收敛性的证明和算例。典型算例表明,本文的方法可准确计算大气波导沿高度和距离方向变化的影响,较之目前普遍使用的傅立叶分裂步方法具有准确和处理边界条件方便之优点。
An implicit finite-difference (IFD) scheme of box method is introduced for solving the parabolic equation representing electromagnetic wave propagation in the troposphere. The consistency, stability and convergence of the box method is demonstrated. More accurate results are obtained while the modified refrac-tivity varies both with the height and the distance. Compared with the popular used Fourier split-step method, the box method has the advantage of having more accurate results and solving boundary conditions easier.
关键词
电磁波传播
有限差分法
箱式差分格式
Electromagnetic wave propagation, Finite-difference scheme, Box method
