Axial Ratio Improvement of Circularly Polarized Antenna Using Parasitic Elements for 5G Applications

IF 0.9 4区工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2023-10-03 DOI:10.1155/2023/6619073

Samira Mohammadkhani, Alireza Mallahzadeh

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引用次数: 0

Abstract

A circular polarization (CP) antenna that can switch between right-handed circular polarization (RHCP) and left-handed circular polarization (LHCP) modes has been designed and introduced for 5G applications in the 3.5 GHz frequency band in this work. The proposed antenna comprises a crossed dipole fed by a 90° hybrid coupler. The axial ratio (AR) enhancement of 190 MHz is achieved by vertically stacking a substrate with a distance of λ/4 from the ground plane, including an annular ring-shaped parasitic element above a circular-shaped disc. Consequently, by creating surface current rotation on the parasitic elements, the CP performance of the antenna is improved. According to the experiments, a wide impedance bandwidth of 930 MHz (3.19-4.12 GHz) and an overlapped AR bandwidth of 23.5% for both modes are achieved. The overall size of the antenna is 100 × 92.5 × 24 mm³, and the gain is stable across the operating frequency band with a peak value of 6.78 dBic.

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基于寄生元件的5G圆极化天线轴比改进

本工作设计并推出了一种可在3.5 GHz频段的5G应用中在右手圆极化(RHCP)和左手圆极化(LHCP)模式之间切换的圆极化(CP)天线。所提出的天线包括由90°混合耦合器馈电的交叉偶极子。190 MHz的轴向比(AR)增强是通过垂直堆叠基片来实现的，基片与地平面的距离为λ / 4，其中包括圆形圆盘上方的环形寄生元件。因此，通过在寄生元件上产生表面电流旋转，提高了天线的CP性能。实验结果表明，两种模式均实现了930 MHz (3.19-4.12 GHz)的宽阻抗带宽和23.5%的重叠AR带宽。天线的整体尺寸为100 × 92.5 × 24 m × 3，在整个工作频段内增益稳定，峰值为6.78 dBic。

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

International Journal of RF and Microwave Computer-Aided Engineering 工程技术-工程：电子与电气

CiteScore

4.00

自引率

23.50%

发文量

489

审稿时长

3 months

期刊介绍： International Journal of RF and Microwave Computer-Aided Engineering provides a common forum for the dissemination of research and development results in the areas of computer-aided design and engineering of RF, microwave, and millimeter-wave components, circuits, subsystems, and antennas. The journal is intended to be a single source of valuable information for all engineers and technicians, RF/microwave/mm-wave CAD tool vendors, researchers in industry, government and academia, professors and students, and systems engineers involved in RF/microwave/mm-wave technology. Multidisciplinary in scope, the journal publishes peer-reviewed articles and short papers on topics that include, but are not limited to. . . -Computer-Aided Modeling -Computer-Aided Analysis -Computer-Aided Optimization -Software and Manufacturing Techniques -Computer-Aided Measurements -Measurements Interfaced with CAD Systems In addition, the scope of the journal includes features such as software reviews, RF/microwave/mm-wave CAD related news, including brief reviews of CAD papers published elsewhere and a "Letters to the Editor" section.