Wideband Dual-Linear Polarized Magnetoelectric Dipole Antenna With Wide Beam-Width in H-Plane

Yuzhen Chen,Wenbo Liu,Tao Wang,Le Yang,Yong Liu,Darong Gao

doi:10.1109/access.2021.3131508

Yuzhen Chen, Wenbo Liu + Show 4 more

Open Access

https://doi.org/10.1109/access.2021.3131508

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Abstract

In this paper, a unidirectional wideband dual-linear polarized magnetoelectric dipole antenna with wide beam-width in H-plane is proposed. The antenna is composed of two orthogonal modified Γ-shaped feeding structures, four V-portions, two pairs of folded electric dipoles, four vertical walls, and a ground. The orthogonal structures realize two orthogonal linear polarizations. To obtain a wide beam-width in H-plane, an extra equivalent magnetic dipole is introduced by folding the arm of the electric dipole and fixing four interdigital vertical walls on the edges of the ground. By comparing with the conventional ME dipole, the proposed ME dipole antenna has the obvious advantage in the beam-width in H-plane and also keeps the wideband property. Furthermore, the working principle and a parameter study are analyzed in detail. Through simulation, the maximum 3-dB beam-width in H-plane is 214.03° and 212.16° for each polarization. According to the measurement results, the overlapped relative bandwidth (VSWR<1.5) is 66.7GHz -3 GHz). The boresight gain varies from 2.5 dBi to 5.7 dBi. The simulated and measured radiation patterns show a stable unidirectional radiation property and agree well with each other.

Highlights

Antenna with wide beam-width has been obtained increasing interests of researchers in recent decades [1,2,3]
If the antenna element is narrow beam-width, lots of antennas should be needed to guarantee a large coverage. In consideration of this drawback, the wide beam-width antenna element has its advantages in large coverage communications
Because of the characteristics of wideband, high front-to-back ratio, and stable unidirectional radiation, the ME dipole antenna was widely used in the base station communication [9]

Summary

INTRODUCTION

Antenna with wide beam-width has been obtained increasing interests of researchers in recent decades [1,2,3]. Antennas with wideband and dual-polarization have been developed rapidly to increase the communication rate and capacity [4,5,6]. To satisfy the requirement of large coverage communications, many wide beam-width ME dipole antennas were proposed. In [14], an ME dipole antenna with reconfigurable beam-width in H-plane was proposed, and the maximum beam-width is 160°. In [21], by adopting the folded ground, a linear polarized ME dipole can realize a beam-width of 120° and relative bandwidth (VSWR

PRINCIPLE AND GEOMETRY

WORKING PRICIPLE

FABRICATION AND MEASUREMENT