A Luneburg Lens-Inspired Flat Lens Antenna With High Gain via Reduced Reflection Loss

IF 4.8 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-06-30 DOI:10.1109/LAWP.2025.3584045

Yang Gao;Zhong-Xun Liu;Haoyu Lei;Yue-Nian Chen;Yongtao Jia;Qiao Sun;Ying Liu

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引用次数: 0

Abstract

A discretized Luneburg lens-inspired (LL-inspired) flat lens antenna is proposed for high-gain applications. Traditional LL-inspired flat lens antennas usually suffer from the reflection loss that occurs during the transformation of spherical LLs (sLLs) into flat lenses via transformation optics. Based on cascaded transmission-line models, a concise discretizing formula is applied to adjust the dielectric distribution of the lens, enabling it to achieve wave impedance quasi-matching for reduced reflection loss. Utilizing this method, the proposed LL-inspired flat lens antenna realizes a gain enhancement of 0.8 dB at 5 GHz compared to reference cases, comparable to the ideal sLL antenna. Finally, a prototype of the proposed antenna was fabricated by 10-layered drilled substrates. The overall dimension of the prototype antenna is 2.67λ₀ × 2.67λ₀ × 1.67λ₀ (λ₀ at 5 GHz). Experimental results indicate that the prototype achieves a gain range of 17.68 dBi to 18.54 dBi over a frequency band of 4.7 GHz to 5.2 GHz, which shows good coincidence with simulated ones.

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通过减少反射损耗实现高增益的Luneburg透镜启发平面透镜天线

提出了一种用于高增益应用的离散吕尼堡透镜启发（l -启发）平面透镜天线。传统的l -启发平面透镜天线在通过变换光学将球面l -启发平面透镜转换为平面透镜时，通常会受到反射损耗的影响。基于级联传输在线模型，采用简洁的离散化公式调整透镜的介电分布，使其达到波阻抗准匹配，从而降低反射损耗。利用这种方法，与参考情况相比，所提出的ll启发平面透镜天线在5 GHz时实现了0.8 dB的增益增强，与理想的ll天线相当。最后，用10层钻孔基板制作了该天线的原型。原型天线的外形尺寸为2.67λ0 × 2.67λ0 × 1.67λ0 （5 GHz时λ0）。实验结果表明，样机在4.7 GHz ~ 5.2 GHz频带上的增益范围为17.68 ~ 18.54 dBi，与仿真结果吻合较好。

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

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.