4-Port 2-Element MIMO Antenna for 5G Portable Applications

Hassan Tariq Chattha

doi:10.1109/access.2019.2925351

Abstract

In this paper, a compact, low-profile four-port, two-element antenna for the 5G Internet of Things (IoT) and handheld applications with height $h=3.0$ mm is presented. The antenna structure contains two planar inverted-F antenna (PIFA) elements having the same shapes. Each antenna element has two feeding plates placed at the right angle to each other to make them cross-polarized for the exploitation of polarization diversity, whereas spatial diversity is employed by positioning two antennas diagonally on opposite sides of the antenna structure. For reducing mutual coupling, the etching of rectangular slots on each side of the ground plane beneath the top plate of each element has been done to stop the flow of current between two ports of the same antenna element. Maximum isolation achieved among ports is less than −25 dB, and envelope correlation coefficient is below 0.009 in bands of interest. The minimum frequency range covered by the four ports of this antenna is from around 2.7 to 3.6 GHz for $S_{11} dB, thus covering expected future 5G band (3300–3600 MHz), and may be used for small portable and handheld the IoT and cellular applications as a diversity/MIMO antenna.

Highlights

With the fast pace evolution happening in wireless communication systems, there is an ever-increasing need for high performance of portable handheld applications which mainly include very high data rates. 5G, the generation telecommunication standard is expected to have data rates of tens of megabits per second, i.e. up to 10 Gbps [1], [2]
This paper presents a 4-ports 2-element antenna for h = 3.0 mm using Planar Inverted-F Antennas (PIFAs) as antenna elements
It is shown that the maximum isolation achieved between ports of two PIFAs is below −25 dB whereas the minimum isolation achieved between the ports of same PIFA element is around −13 dB in region of interest

Summary

Introduction

With the fast pace evolution happening in wireless communication systems, there is an ever-increasing need for high performance of portable handheld applications which mainly include very high data rates. 5G, the generation telecommunication standard is expected to have data rates of tens of megabits per second, i.e. up to 10 Gbps [1], [2]. Numerous two-port, two-element MIMO antennas are found in literature using mainly space diversity to achieve diversity gain [7]–[10].

Results

Conclusion