A novel wideband reflectarray using sub-wavelength Archimedes spiral unit cell

IF 0.6 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Electromagnetics Pub Date : 2022-08-18 DOI:10.1080/02726343.2022.2140915

Zhiyuan Yang, Jie Zhang, Yufeng Liu, Wenmei Zhang, Qiang Zhang, Yang Gao, Zongwei Tong

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引用次数: 1

Abstract

ABSTRACT A novel wideband reflectarray antenna based on a sub-wavelength Archimedes spiral unit cell is proposed in this paper. The size of the unit cell is fixed to ( -the free space wavelength at 5.8 GHz), and the reflection phase variation can be obtained by changing the inward extension length of the arms. After the element simulation analysis, a smooth and almost linear reflection phase curve is achieved. The phase range can reach more than 500°, which is enough to meet the phase shift requirement of the reflectarray. Based on the proposed unit cell, a 10 × 10-element reflectarray with the size of 220 mm×220 mm is designed, fabricated, and measured. The measured result agrees well with the simulations, which show relatively wide 1- and 3-dB gain bandwidths of 20.7% (5.57–6.77 GHz) and 31.4% (5.31–7.13 GHz), respectively. The measured gain at its working frequency of 5.8 GHz is 18.9 dBi with an aperture efficiency of 34.2%. Furthermore, the cross-polarization levels of the proposed antenna are less than −25 dB, which attributes to all the elements that are arranged mirror symmetrically.

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一种新型的亚波长阿基米德螺旋晶胞宽带反射阵列

本文提出了一种基于亚波长阿基米德螺旋晶胞的新型宽带反射阵列天线。晶胞的尺寸固定为（-5.8GHz的自由空间波长），并且可以通过改变臂的向内延伸长度来获得反射相位变化。经过单元仿真分析，得到了一条光滑、近似线性的反射相位曲线。相位范围可以达到500°以上，足以满足反射阵列的相移要求。基于所提出的晶胞，设计、制造并测量了尺寸为220 mm×220 mm的10×10单元反射阵列。测量结果与模拟结果一致，模拟结果显示相对较宽的1 dB和3 dB增益带宽分别为20.7%（5.57–6.77 GHz）和31.4%（5.31–7.13 GHz）。在5.8 GHz的工作频率下测得的增益为18.9 dBi，孔径效率为34.2%。此外，所提出的天线的交叉极化电平小于−25 dB，这归因于镜像对称排列的所有元件。

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

Electromagnetics 工程技术-工程：电子与电气

CiteScore

1.60

自引率

12.50%

发文量

审稿时长

6 months

期刊介绍： Publishing eight times per year, Electromagnetics offers refereed papers that span the entire broad field of electromagnetics and serves as an exceptional reference source of permanent archival value. Included in this wide ranging scope of materials are developments in electromagnetic theory, high frequency techniques, antennas and randomes, arrays, numerical techniques, scattering and diffraction, materials, and printed circuits. The journal also serves as a forum for deliberations on innovations in the field. Additionally, special issues give more in-depth coverage to topics of immediate importance. All submitted manuscripts are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees. Submissions can be made via email or postal mail.