A Terahertz Wide-Angle Beam-Steering 3D-Printed Dual-Polarized GRIN Lens With Planar Focal Surface

IF 3.9 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-06 DOI:10.1109/TTHZ.2025.3539503

Yue Guo;Fanyi Meng;Kaixue Ma;Jianli Ma;Yu Luo

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Abstract

A terahertz gradient-index (GRIN) dual-polarized lens with wide-angle beam-steering is designed in this article. A novel GRIN distribution is designed by superimposing the refractive index of the Luneburg lens and the Gutman lens to expand the beam-steering angle. The effects of the superposition ratio of Luneburg lens and Gutman lens

${\bm{\ }}$

on the scanning performance of GRIN lens are studied. The novel GRIN distribution is provided for two different purposes. The lens has good scanning performance with a planar feed, and dual polarization can be achieved. High-precision 3-D printing technology is utilized to fabricate the proposed lens to verify the proposed GRIN distribution. A GRIN lens with an aperture size of 8 mm × 8 mm and a thickness of 6.4 mm was manufactured. The proposed lens is measured to validate the implementation method at 220 GHz. The results show that the proposed GRIN lens has a wide beam scanning angle of ±39° and ±38° in vertical polarization and horizontal polarization, respectively. The lens has a peak gain of 19.2 dBi. The scanning losses of the lens are 0.5 dB for vertical polarization and 0.7 for horizontal polarization, respectively.

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一种太赫兹广角光束导向平面焦面的3d打印双偏振GRIN透镜

设计了一种具有广角光束导向的太赫兹梯度折射率（GRIN）双偏振透镜。通过叠加吕尼堡透镜和古特曼透镜的折射率，设计了一种新的GRIN分布，以扩大光束的转向角。研究了吕尼堡透镜与古特曼透镜${\bm{\}}$的叠加比对GRIN透镜扫描性能的影响。新的GRIN发行版有两个不同的用途。该透镜具有良好的平面进给扫描性能，可实现双偏振。利用高精度3d打印技术制作了所提出的透镜，以验证所提出的GRIN分布。制备了孔径为8 mm × 8 mm、厚度为6.4 mm的GRIN透镜。对所提出的透镜进行了测量，以验证在220 GHz下的实现方法。结果表明，所设计的GRIN透镜在垂直偏振和水平偏振下具有±39°和±38°的宽光束扫描角。该镜头的峰值增益为19.2 dBi。垂直偏振和水平偏振的扫描损耗分别为0.5 dB和0.7 dB。

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来源期刊

IEEE Transactions on Terahertz Science and Technology ENGINEERING, ELECTRICAL & ELECTRONIC-OPTICS

CiteScore

7.10

自引率

9.40%

发文量

102

期刊介绍： IEEE Transactions on Terahertz Science and Technology focuses on original research on Terahertz theory, techniques, and applications as they relate to components, devices, circuits, and systems involving the generation, transmission, and detection of Terahertz waves.