AFSS反射器双脉冲周期间歇调制方法

针对无源电磁调控中目标模拟样式单一且灵活性欠缺的问题，利用有源频率选择表面(active frequency selective surface, AFSS)电磁散射特性可调且不主动辐射电磁波的特性, 提出了一种AFSS反射器电磁散射状态切换的双脉冲周期间歇调制方法。构建了AFSS反射器的双脉冲周期间歇调制信号模型, 分析了调制信号的特点。通过理论推导, 研究了AFSS反射器对雷达线性调频信号回波匹配滤波结果的影响。最后进行了仿真验证, 结果证明了所提方法的有效性和可行性。该方法增加了控制参数维度, 调制样式更为丰富, 应用于雷达目标模拟时可以提高其可变性和灵活性。

AFSS reflector double pulse cycle intermittent modulation method

To address the problem of single and inflexible target simulation in passive eletromagnetic modulation, using the advantages of adjustable electromagnetic scattering characteristics of the active frequency selective surface (AFSS) and not actively radiating electromagnetic waves, a double-pulse periodic intermittent modulation method for switching the electromagnetic scattering state of the AFSS reflector is proposed. The double-pulse intermittent modulation signal model of AFSS reflector is constructed, and the characteristics of the modulated signal are analyzed. Through theoretical derivation, the effect of AFSS reflector on the echo matching filtering results of radar linear frequercy modulation signal is investigated. Finally, simulations are performed to verify the results, which prove the effectiveness and feasibility of the proposed method. The method increases the dimensionality of control parameters and the modulation style is more abundant, which can be applied to radar target simulation to improve its variability and flexibility.