【摘要】 采用了理想匹配吸收层技术改进了了基于衍射几何射线法(GTD)与时域有限差分法(FDTD)的混合方法,改进后的方法使计算结果比基于Mur吸收边界条件的混合法更精确更具有稳定性。该方法可作为一种移动通信系统设计方法的新选择;利用该方法研究了由室外到室内的电波传播预测,给出了计算结果和传播规律性。更多还原

【Abstract】 An improved method based on a hybrid method from geometrical theory of diffraction(GTD) and finite-difference time-domain(FDTD)method is proposed, in which the perfectly matched layer(PML) absorbing boundary conditions(ABCs) is applied to FDTD lattices. The results of the improved hybrid method are more accurate and more stable than the hybrid method using Mur ABCs. The improved method gives a guideline for choosing an efficient method in the effective design of mobile communications systems. Furthermore the improved method is used to predict the radio propagation from outdoor to indoor and examples are given.更多还原