Based on polarization conversion metamaterial, a novel method to counter single-polarization radar is proposed and discussed in this paper. Due to the resonance feature in the polarization conversion, energy attenuation and waveform distortion dual functions can be achieved. For radar, that will strongly reduce the SNR (Signal-to-Noise Ratio) of the matched filter and the probability of detection. A broadband polarization conversion metamaterial structure was designed with multi resonance frequencies. To evaluate the effectiveness, a typical pulse compression radar model was established, the waveform property, correlation loss in the matched filter and probability of radar detection were simulated and calculated. It was found that the metamaterial achieved the function of passive signal modulation, the echo energy was reduced markedly and great distortion was generated near the resonance frequencies, also the correlation loss in the matched filter was significantly increased especially near the resonance frequencies. Finally the calculated probability of radar detection gave furthermore proof of the effectiveness of the method.

中文翻译：

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基于偏振转换超材料的反单偏振雷达

本文提出并讨论了一种基于极化转换超材料的单极化雷达对抗新方法。由于偏振转换中的谐振特性，可以实现能量衰减和波形失真双重功能。对于雷达，这将大大降低匹配滤波器的 SNR（信噪比）和检测概率。设计了具有多谐振频率的宽带偏振转换超材料结构。为评估其有效性，建立了典型的脉冲压缩雷达模型，对波形特性、匹配滤波器中的相关损耗和雷达检测概率进行了仿真计算。发现超材料实现了被动信号调制的功能，回波能量显着降低，谐振频率附近产生较大失真，匹配滤波器的相关损耗显着增加，尤其是在谐振频率附近。最后，计算出的雷达探测概率进一步证明了该方法的有效性。