一种用于MIMO配置中增强隐身性和RCS缓解的超宽带偏振转换超表面

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2025-04-01 DOI:10.1016/j.aeue.2025.155793

Madhusudhan Goud Rangula , Princy Paul , Basudev Majumder , Krishnamoorthy Kandasamy

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引用次数: 0

摘要

为了提高MIMO天线的隐身性能，提出了一种用于高效交叉极化转换的单层宽带超表面。提出了一种低轮廓、最小复杂性的元原子及其镜像，具有对角金属带和两条狭窄的水平边缘带。这种结构实现了90%以上的极化转换效率，同时保持了两个元原子反射波之间180度的绝对相位梯度。利用元原子和镜像构造了一个具有10x10元素的棋盘元表面，并将其与基于槽天线的MIMO配置集成在一起。槽天线垂直排列形成四元MIMO配置，确保各个元件之间的高隔离度超过25 dB。在正交辐射下实现的峰值增益为6.95 dBi。单基地，双基地，和三维散射模式的MIMO配置与没有超表面进行了评估。在斜入射下，超表面表现出出色的角稳定性，在入射角高达60°时保持最小RCS降低10 dB。制造和优化的原型显示的测量结果与正常和斜入射情景的模拟结果密切对应。

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An ultra-broadband polarization conversion metasurface for enhanced stealth and RCS mitigation in MIMO configurations

A single-layer broadband metasurface for efficient cross-polarization conversion, aiming at improving the stealth performance of a MIMO antenna, is proposed in this work. A low-profile, minimally complex meta-atom and its mirror image are proposed, featuring a diagonal metallic strip and two narrow horizontal edge strips. This configuration achieves more than 90 % polarization conversion efficiency while maintaining an absolute 180-degree phase gradient between the reflected waves of the two meta-atoms. A chessboard metasurface with 10x10 elements, constructed with the proposed meta-atom and mirror image, is integrated with the slot antenna-based MIMO configuration. A slot antenna is orthogonally arranged to form a four-element MIMO configuration, ensuring high isolation exceeding 25 dB between the individual elements. The realized peak gain of this arrangement is 6.95 dBi radiating orthogonally. Monostatic, bistatic, and 3D scattering patterns of a MIMO configuration with and without metasurface are evaluated. Under oblique incidence, the metasurface demonstrates exceptional angular stability, maintaining a minimum RCS reduction of 10 dB for incidence angles up to 60°. The fabricated and optimized prototype exhibits measurement outcomes that closely correspond to the simulation results for normal and oblique incidence scenarios.

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.