Wideband Asymmetric Coplanar Strip Fed Antennas With Pattern Diversity for mmWave 5G Base Stations

M Idrees Magray,Ayaz Hassan Moon,G S Karthikeya,Shiban Kishen Koul,Khalid Muzaffar

doi:10.1109/access.2020.2990205

Abstract

A compact asymmetric coplanar strip (ACS)-fed mmWave 5G antenna with 6.5-7.5 dBi end-fire gain is presented in this paper. The proposed antenna is wideband, operating from 26–32 GHz with fractional bandwidth of 20.7%. The proposed single element antenna has dimensions of $6 \times 10$ mm2 demonstrating small physical and electrical footprint. The antenna achieves 1-dB gain bandwidth of 20.7% which demonstrates pattern integrity over whole operating band. The reported antenna also achieves reasonable gain for the available aperture. In order to achieve pattern diversity, a shared ground compact two-port antenna topology is next presented for beam switching at ±30°. In addition to this, a quasi-stacked beam switching module integrated with low cost 3D-printed scaffolding with wide angular coverage is proposed with adequate technical justification.

Highlights

Fifth generation cellular networks (5G) promise high data rates, almost 1000 times as compared to fourth generation mobile networks (4G) [1]
A compact three dimensional asymmetric coplanar strip (ACS)-fed antenna topology is proposed for mmWave 5G base stations
Proposed antenna architecture consists of central element which is placed above the ground shared module for beam steering at 0◦, +30◦ and −30◦

Summary

Introduction

Fifth generation cellular networks (5G) promise high data rates, almost 1000 times as compared to fourth generation mobile networks (4G) [1]. Several antenna designs have been reported on mmWave 5G frequencies in [4]–[7] but they have large physical footprint leading to a higher occupied volume which might not be suitable for compact base stations or access points per se. The proposed antenna operates over a wideband covering mmWave frequencies from 26-32 GHz. Forward end-fire gain of 6.5-7.5 dBi is achieved for the available aperture.

Results

Conclusion