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

被引：1

作者：

Mohammadkhani, Samira ^{[1
]}

Mallahzadeh, Alireza ^{[1
]}

机构：

[1] Shahed Univ, Elect & Elect Engn Dept, Tehran 1915713495, Iran

来源：

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING | 2023年 / 2023卷

关键词：

DIPOLE;

D O I：

10.1155/2023/6619073

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

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 degrees hybrid coupler. The axial ratio (AR) enhancement of 190 MHz is achieved by vertically stacking a substrate with a distance of lambda/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 100x92.5x24 mm3, and the gain is stable across the operating frequency band with a peak value of 6.78 dBic.

引用

页数：14

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