A low radar cross section antenna array based on a liquid metal metasurface

IF 1.1 4区计算机科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Iet Microwaves Antennas & Propagation Pub Date : 2024-01-23 DOI:10.1049/mia2.12452

Lu-Yang Ji, Xiaoyue Hong, Rui Yang, Qingyue Liu, Wenhan Zhang

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Abstract

A low RCS (radar cross section) slot array antenna based on a liquid metal metasurface is proposed. The metasurface consists of 6 × 6 nested ring-shaped element. The inner ring with a checkerboard distribution can realise 180° ± 37° phase difference, which can effectively reduce the scattering performances for the slot array. The outer and inner ring together can excite more energy from the slot array, thus resulting in increased radiation gains. Therefore, by changing the layout of liquid metal on the metasurface, scattering and radiation enhancement modes can be switched. The measured results show that in the scattering mode, the RCS can be reduced from 8.1 to 17 GHz. While in the radiation enhancement mode, the proposed array with the metasurface can achieve a −10-dB impedance bandwidth of 9.4–11.2 GHz (17.4%) with a maximum gain of 8.12 dBi. Compared with the slot array without the metasurface, the realised gain is enhanced by 1.2 dBi from 6.9 dBi. The measured results correspond well with the simulated ones.

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基于液态金属超表面的低雷达截面天线阵列

本文提出了一种基于液态金属元面的低 RCS（雷达截面）槽阵列天线。元表面由 6 × 6 嵌套环形元件组成。内环采用棋盘式分布，可实现 180° ± 37° 的相位差，能有效降低槽阵的散射性能。外环和内环一起可以激发槽阵的更多能量，从而增加辐射增益。因此，通过改变元表面上液态金属的布局，可以切换散射和辐射增强模式。测量结果表明，在散射模式下，RCS 可以从 8.1 GHz 降低到 17 GHz。而在辐射增强模式下，带元表面的拟议阵列可实现 9.4-11.2 GHz（17.4%）的 -10-dB 阻抗带宽，最大增益为 8.12 dBi。与没有元表面的槽阵相比，实际增益从 6.9 dBi 提高了 1.2 dBi。测量结果与模拟结果十分吻合。

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来源期刊

Iet Microwaves Antennas & Propagation 工程技术-电信学

CiteScore

4.30

自引率

5.90%

发文量

109

审稿时长

7 months

期刊介绍： Topics include, but are not limited to: Microwave circuits including RF, microwave and millimetre-wave amplifiers, oscillators, switches, mixers and other components implemented in monolithic, hybrid, multi-chip module and other technologies. Papers on passive components may describe transmission-line and waveguide components, including filters, multiplexers, resonators, ferrite and garnet devices. For applications, papers can describe microwave sub-systems for use in communications, radar, aerospace, instrumentation, industrial and medical applications. Microwave linear and non-linear measurement techniques. Antenna topics including designed and prototyped antennas for operation at all frequencies; multiband antennas, antenna measurement techniques and systems, antenna analysis and design, aperture antenna arrays, adaptive antennas, printed and wire antennas, microstrip, reconfigurable, conformal and integrated antennas. Computational electromagnetics and synthesis of antenna structures including phased arrays and antenna design algorithms. Radiowave propagation at all frequencies and environments. Current Special Issue. Call for papers: Metrology for 5G Technologies - https://digital-library.theiet.org/files/IET_MAP_CFP_M5GT_SI2.pdf