基于亮点法建立了目标位于雷达近场时的系统模型。讨论了目标回波信号的幅度、相位和时延的计算方法。利用时域有限差分法,建立引信雷达天线产生的近场特性数据库。将板级电路仿真和天线近场计算结合起来,建立引信系统仿真器。通过这个仿真器可以更加精确可靠地对引信系统进行仿真。最后时域仿真结果证明这种仿真器可以有效地应用到武器系统的模拟仿真中。 Based on the bright spot method, a system model of the target in the radar near field is established. The method of calculating the amplitude, phase and delay of the target echo signal is discussed. Using the finite difference time domain method, a near-field property database generated by the fuze radar antenna is established. The board level circuit simulation and antenna near-field computing combine to establish a fuse system simulator. Through this simulator can be more accurately and reliably fuze system simulation. The last time domain simulation results prove that this kind of simulator can be effectively applied to the simulation of weapon system.