【摘要】 时域有限差分(FDTD)方法是计算时域电磁散射和辐射的方法,在处理色散介质电磁波传播及散射问题时,应用Z变换获得FDTD计算中电位移矢量D到电场强度E的时域递推关系式。并且应用这一方法分析线性调频雷达信号在电离层中的传播特性。更多还原

【Abstract】 The finite-difference time-domain (FDTD) method is a numerical technique for calculating electromagnetic scattering and radiation in time domain. While use of Z transform theory to treat dispersive media, FDTD method is capable of correctly calculating electromagnetic propagation through media whose dielectric properties are frequency-dependent. Based on the parameters of ionosphere, this method is applied to analyze the propagation of a linear frequency modulation radar signal through the ionosphere.更多还原