A Broadband Circularly Polarized Antenna Using Characteristic Mode Analysis

IF 4.6 1区计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Antennas and Propagation Pub Date : 2024-10-31 DOI:10.1109/TAP.2024.3486466

Wei Hao Chen;Liang Hua Ye;Kang Ding;Fan Jiang;Duo-Long Wu

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引用次数: 0

Abstract

A low-profile and broadband circularly polarized (CP) antenna is presented. The CP antenna element comprises several patch cells and an L-shaped strip with three branches on the same layer. The patch cells and the L-shaped strip excite four linear polarized modes, while three branches shift these modes to suitable frequencies using characteristic mode analysis. Furthermore, a two-port antenna is constructed by mirroring the CP antenna element, where the middle patch cells can further broaden the bandwidth and cancel opposite currents to provide 27.5 dB isolation. Finally, a

$2\times 2$

antenna array realizes wide bandwidth and high gain. The fabricated CP antenna element, the two-port antenna, and the

$2\times 2$

antenna array achieve wide bandwidths of 19.5%, 21.1%, and 33.6% (

$\vert S_{11}\vert \lt -10$

dB, axial ratio <3 dB), respectively. The measured isolation for the two-port CP antenna exceeds 27.5 dB. Besides, these antennas maintain a lower profile of 0.036 free-space wavelengths at the center frequency of 3.60 GHz and are a suitable candidate for future 5G applications.

查看原文本刊更多论文

本文介绍了一种低剖面宽带圆极化（CP）天线。CP 天线元件由多个贴片单元和同一层上带有三个分支的 L 形条组成。贴片单元和 L 形条激发出四个线性极化模式，而三个分支则利用特征模态分析将这些模式转移到合适的频率。此外，还通过镜像 CP 天线元件构建了双端口天线，中间的贴片单元可进一步拓宽带宽并抵消反向电流，从而提供 27.5 dB 的隔离度。最后，2/times 2$ 天线阵列实现了宽带宽和高增益。制作的CP天线元件、双端口天线和2\times 2$天线阵列分别实现了19.5%、21.1%和33.6%的宽带宽（$\vert S_{11}\vert \lt -10$ dB，轴向比<3 dB）。双端口 CP 天线的测量隔离度超过 27.5 dB。此外，这些天线在中心频率 3.60 GHz 时保持了 0.036 个自由空间波长的较低剖面，是未来 5G 应用的合适候选天线。

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 Transactions on Antennas and Propagation 工程技术-电信学

CiteScore

10.40

自引率

28.10%

发文量

968

审稿时长

4.7 months

期刊介绍： IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas, including design and development, and in the propagation of electromagnetic waves, including scattering, diffraction, and interaction with continuous media; and applications pertaining to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques