Single Layer PCB Broadband Circular Polarisation Millimetre Wave Massive MIMO Array

TL;DR

This paper presents a simple, low-cost single-layer broadband circularly polarised millimetre wave antenna array suitable for 5G massive MIMO applications, with integrated matching and broad bandwidth.

Contribution

It introduces a novel single-layer antenna element with integrated matching, enabling easy synthesis of large arrays for 5G mm-wave MIMO systems.

Findings

10 dB bandwidth from 26 GHz to 32 GHz

Axial ratio less than 3 within -60° to 60° beamwidth

Simple, low-cost, robust antenna design

Abstract

A single layer broadband millimetre wave (mm-wave) array with circular polarisation is proposed for the fifth generation (5G) mm-wave communication applications. The antenna element is designed to integrate the matching circuit into a single layer. Hence no additional matching and feeding networks are required which makes the antenna element very easy to synthesise a massive array. The array has a 10 dB return loss bandwidth between 26 GHz and 32 GHz. The polar angle axial ratio is less than 3 within the beamwidth of -60 degree to 60 degree. The proposed antenna structure is simple, low cost and robust, which we envisage suitable for the massive multiple-input and multiple-output (MIMO) applications.