Ultrawideband Low-Profile Circularly Polarized Cross-Dipole Antenna With Hybrid AMC Reflector

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

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-07-25 DOI:10.1109/LAWP.2025.3588261

Zhuozhu Chen;Jinwei Cheng;Sha Xu;Wensong Wang

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Abstract

In this letter, an ultrawideband low-profile circularly polarized (CP) antenna with asymmetric cross-dipoles, parasitic patches, and artificial magnetic conductor (AMC) is proposed. A vacant-quarter ring connects orthogonal dipole arms to introduce the required 90° phase difference for generating CP radiation. To reduce the profile of the antenna, an AMC reflector is positioned beneath the radiator. The AMC reflector consists of hybrid metallic patterns printed on a substrate, where two different types of unit cells are arranged in the center and around the periphery separately to expand the in-phase reflection bandwidth. Additionally, metallic strips are added around the edge of the ground to improve the axial ratio and radiation pattern at lower frequencies. Measured results indicate that the impedance bandwidth and the axial ratio bandwidth of the antenna are 1.51 GHz to 5.13 GHz (109%) and 1.54 GHz to 3.57 GHz (79.5%), respectively. The antenna gains maintain 6.3 dBic to 8.3 dBic within the whole operating bandwidth. Furthermore, the antenna features a low profile of 0.13λ_L corresponding to the lowest operating frequency.

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混合AMC反射面超宽带低轮廓圆极化交叉偶极子天线

本文提出了一种具有非对称交叉偶极子、寄生贴片和人工磁导体的超宽带低轮廓圆极化（CP）天线。一个空的四分之一环连接正交偶极子臂，以引入产生CP辐射所需的90°相位差。为了减小天线的轮廓，在散热器下方放置了一个AMC反射器。AMC反射器由印刷在衬底上的混合金属图案组成，其中两种不同类型的单晶分别排列在中心和周围，以扩大同相反射带宽。此外，在地面边缘周围增加了金属条，以改善低频轴比和辐射方向图。测量结果表明，该天线的阻抗带宽为1.51 GHz ~ 5.13 GHz(109%)，轴比带宽为1.54 GHz ~ 3.57 GHz（79.5%）。在整个工作带宽范围内，天线增益保持在6.3 ~ 8.3 dBic。此外，天线的低轮廓为0.13λL，对应于最低的工作频率。

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.