Fu Ao, Wang Chen, Chen Silong, Yang Kunping, Ren Bo, Chen Ping
Opt Express. 2024 Nov 4;32(23):41619-41631. doi: 10.1364/OE.542662.
In this study, a highly flexible metal-ink hybrid metasurface that can be integrated with planar structures is proposed. The metasurface achieves wideband absorption performance while maintaining an efficient transmission window. Based on equivalent circuit model analysis, an aperture-coupled antenna array was integrated with the metasurface, enabling simultaneous wideband radar cross-section (RCS) reduction and high-performance radiation. The integration of the metasurface and antenna array allowed the overall structure to maintain a low profile. Simulation results show that the proposed array achieves a 10 dB RCS reduction against a metal plate of the same size over the [2.03, 8.11] GHz range, with a fractional bandwidth of 119.9% under x-polarized wave incidence. Under y-polarized wave incidence, a 10 dB RCS reduction is achieved at both [2.12, 5.1] GHz and [6.1, 8.06] GHz, with fractional bandwidths of 82.5% and 27.6%, respectively. Moreover, the array maintains a peak gain of 26.3 dBi and sidelobe levels less than -18 dB. The experimental results align well with the simulated results. The proposed low-RCS antenna array offers potential advancements in planar antenna technology, enhancing stealth capabilities.
在本研究中，提出了一种可与平面结构集成的高柔性金属 - 墨水混合超表面。该超表面在保持高效传输窗口的同时实现了宽带吸收性能。基于等效电路模型分析，将孔径耦合天线阵列与超表面集成，实现了同时宽带雷达散射截面（RCS）减小和高性能辐射。超表面与天线阵列的集成使整体结构保持低剖面。仿真结果表明，所提出的阵列在[2.03, 8.11]GHz范围内相对于相同尺寸的金属板实现了10dB的RCS减小，在x极化波入射下分数带宽为119.9%。在y极化波入射下，在[2.12, 5.1]GHz和[6.1, 8.06]GHz处均实现了10dB的RCS减小，分数带宽分别为82.5%和27.6%。此外，该阵列保持26.3dBi的峰值增益且旁瓣电平小于 - 18dB。实验结果与仿真结果吻合良好。所提出的低RCS天线阵列在平面天线技术方面提供了潜在的进展，增强了隐身能力。
