| 摘要: |
| 时间编码超表面具备对电磁波的调制能力，从而有效改变反射电磁波的特性，达到改变目标特性的目的。基于超表面的调控特性，设计了一种周期时间编码的逆合成孔径雷达(Inverse Synthetic Aperture Radar,ISAR)干扰方法。分析了时间编码超表面的相位调制机理，建立了时间编码序列模型，通过设计优化时间编码序列的相关参数，形成对雷达在距离向上的欺骗干扰。通过理论推导，分析了时间编码调制参数对假目标位置、幅度等的影响。仿真实验结果表明，该方法可以根据信号参数生成数量可控、位置可变的虚假目标，距离向干扰范围扩展至2倍以上，从而实现不同的干扰效果，在电子对抗等方面具有较高的应用价值。 |
| 关键词: 逆合成孔径雷达 电子对抗 欺骗干扰 时间编码超表面 虚假距离像 电磁调控 |
| DOI：10.20079/j.issn.1001-893x.240726004 |
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| 基金项目:国家自然科学基金资助项目（62301570） |
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| An ISAR Jamming Method Based on Time-coding Metasurface |
| SHI Qingzhan,HUANG Jingjian,WU Weiwei,MA Yuhong,WANG Shaozhi,ZHENG Zihao,ZHANG Xiaofa |
| (a.College of Electronic Science and Technology,Changsha 410073;b.College of Electronic Engineering,National University of Defense Technology,Hefei 230061,China) |
| Abstract: |
| Time-coding metasurface can modulate incident electromagnetic waves dynamically and in real-time,effectively altering the characteristics of the reflected waves to change the properties of the target.In view of the modulation capabilities of this technology,an inverse synthetic aperture radar (ISAR) jamming method based on time-coding metasurface is proposed.First, the electromagnetic modulation mechanism of time-coding metasurface is analyzed,the model of time-coding sequence is established,and through the optimization of relevant parameters of the time-coding sequence, deceptive jamming for the radar in the range direction is created.Through theoretical derivation,the impact of time-coding modulation parameters on the position and amplitude of false targets is analyzed.Simulation results show that the method can generate controllable numbers and variable positions of false targets according to signal parameters.The jamming range can be extended to 2 times,thus achieving various radar jamming effects.The method has high application value in electronic countermeasures. |
| Key words: inverse synthetic aperture radar electronic countermeasures deceptive jamming time-coding metasurface false range images electromagnetic modulation |
