Ka波段折叠反射天线的圆偏振选择性超表面

IF 3.7 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-24 DOI:10.1109/LAWP.2025.3533742

Heng Huang;Jingxin Ye;Chunhua Xue;Teng Li

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引用次数: 0

摘要

提出了一种30 GHz波段的圆极化折叠反射天线。采用五层圆偏振选择超表面（CPSM）实现了CP源的路径折叠。CPSM元件由两个背靠背连接的CP天线组成，在地平面上有一个倾斜的i形槽，用于电磁波耦合。设计了一种2 × 2的贴片阵列，在中心嵌入一个十字形条带，用于CP响应。为了增强角响应稳定性，在顶部和底部两侧都堆叠了方形补丁。金属柱穿过所有层放置在中心，以平衡传输和轴向比（AR）带宽。所提出的CPSM元件在大斜入射角下具有良好的增AR和振幅性能，这保证了折叠反射天线具有良好的孔径效率以及可观的增AR和增益带宽。为了验证所提出的CPSM，给出了一个40 × 40的折叠反射射线。测量结果表明，3db AR带宽为20.3%，3db增益带宽为15.13%。在30 GHz时的峰值增益为33.89 dBic，孔径效率为60.9%。结果表明，所提出的CPSM具有良好的天线工程应用前景。

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Circular Polarization Selective Metasurface for Folded Reflectarray Antenna at Ka Band

A circular polarization (CP) folded reflectarray antenna is proposed at the 30 GHz band. A five-layered circular polarization selective metasurface (CPSM) is introduced to realize the path folding for a CP source. The CPSM element consists of two back-to-back connected CP antennas with a slant I-shaped slot on the ground plane for electromagnetic wave coupling. A 2 × 2 patch array with a cross-shaped strip embedded in the center is designed for CP response. To enhance angular response stability, square patches are stacked on both the top and bottom sides. A metallic post through all layers is placed in the center to balance the transmission and axial ratio (AR) bandwidth. The proposed CPSM element exhibits superior AR and amplitude performance under larger-angle oblique incidence which promises the folded reflectarray antenna achieves excellent aperture efficiency along with substantial AR and gain bandwidth. To verify the proposed CPSM, a 40 × 40 folded reflectarray is presented. The measured results show a 3 dB AR bandwidth of 20.3% and a 3 dB gain bandwidth of 15.13%. The peak gain of 33.89 dBic is found at 30 GHz with an aperture efficiency of 60.9%. The remarkable results demonstrate the proposed CPSM for antenna engineering applications.

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来源期刊

IEEE Antennas and Wireless Propagation Letters 工程技术-电信学

CiteScore

8.00

自引率

9.50%

发文量

529

审稿时长

1.0 months

期刊介绍： IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.