Time Modulated Metasurface in X-Band for Radar Countermeasure

IF 1.2 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Microwave and Optical Technology Letters Pub Date : 2025-08-20 DOI:10.1002/mop.70366

K. P. S. Maan, Rahul Vishwakarma, Kumar Vaibhav Srivastava

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引用次数: 0

Abstract

This study presents the design and implementation of reconfigurable metasurface time modulation in the X-band. Three layers form the time-modulated metasurface, with the middle layer switchable ground. The switching behavior of the PIN diode changes the reflection coefficient over time. Time-modulated complex-valued reflection coefficients produce harmonics with reduced reflected frequency component power and increased side-band power. The harmonic with reduced incidence frequency component power offers extra frequency shift and incorrect velocity information to X-band Doppler radar. A prototype with a thickness of 0.12 $λ_{L}$ and a periodicity of 0.26 $λ_{L}$ (the lowest frequency) is proposed. In the frequency range of 7.8–12.9 GHz, the measured spectrum of the reflected electromagnetic wave component at $f_{in}$ ranges from −0 to −17 dB. The authors claim this is the first experimental proof of a time-modulated metasurface in the 7.8–12.9 GHz frequency range (X-band). The structure can disrupt X-band Doppler radar target recognition and tracking with a Doppler-like frequency shift in the reflected wave.

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用于雷达对抗的x波段时间调制超表面

本研究提出了可重构x波段超表面时间调制的设计与实现。三层构成时调制超表面，中间层为可切换地。PIN二极管的开关行为随时间改变反射系数。时间调制的复值反射系数产生的谐波降低了反射频率分量功率，增加了边带功率。入射频率分量功率降低的谐波会给x波段多普勒雷达带来额外的频移和错误的速度信息。提出了厚度为0.12 λ L ${\lambda}_{L}$，周期为0.26 λ L ${\lambda}_{L}$（最低频率）的原型。在7.8 ~ 12.9 GHz频率范围内，f In $\,{{\text{f}} _{\ maththrm {In}}$处反射电磁波分量的测量频谱范围为−0 ~−17 dB。作者声称，这是7.8-12.9 GHz频率范围（x波段）的时间调制超表面的第一个实验证明。该结构可以通过反射波中的类多普勒频移干扰x波段多普勒雷达目标识别和跟踪。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Microwave and Optical Technology Letters 工程技术-工程：电子与电气

CiteScore

3.40

自引率

20.00%

发文量

371

审稿时长

4.3 months

期刊介绍： Microwave and Optical Technology Letters provides quick publication (3 to 6 month turnaround) of the most recent findings and achievements in high frequency technology, from RF to optical spectrum. The journal publishes original short papers and letters on theoretical, applied, and system results in the following areas. - RF, Microwave, and Millimeter Waves - Antennas and Propagation - Submillimeter-Wave and Infrared Technology - Optical Engineering All papers are subject to peer review before publication