【摘要】 应用时域有限差分 ( FDTD)方法和时域加窗技术从物体的时域散射场中分离出劈和凹槽一类散射中心的贡献 ,计算其远区数值绕射系数。对于电小尺寸凹槽的远区数值绕射系数 ,结合微扰法给出了其计算结果更多还原

【Abstract】 The far zone numerical diffraction coefficient is computed by using the finite difference time domain (FDTD) method and time gating technigue. The contribution of a scattering center of interest, such as a wedge or groove, is isolated effectively from the transient response of an object. Some results of the far zone numerical diffraction coefficients for an electrically small groove are presented by additionally using perturbation method.更多还原