Design of Quad-Port Ultra-Wideband Multiple-Input-Multiple-Output Antenna with Wide Axial-Ratio Bandwidth.

Pawan Kumar,Shabana Urooj,Areej Malibari

doi:10.3390/s20041174

Abstract

This article presents a compact, planar, quad-port ultra-wideband (UWB) multiple-input–multiple-output (MIMO) antenna with wide axial ratio bandwidth (ARBW). The proposed MIMO design consists of four identical square-shaped antenna elements, where each element is made up of a circular slotted ground plane and feed by a 50 Ω microstrip line. The circular polarization is achieved using a protruding hexagonal stub from the ground plane. The four elements of the MIMO antenna are placed orthogonally to each other to obtain high inter-element isolation. FR-4 dielectric substrate of size 45 × 45 × 1.6 mm3 is used for the antenna prototype, and a good agreement is noticed among the simulated and experimental results. The proposed MIMO antenna shows 3-dB ARBW of 52% (3.8–6.5 GHz) and impedance bandwidth (S11 ≤ −10 dB) of 144% (2.2–13.5 GHz).

Highlights

The increasing demand of planar antennas for wireless applications is due to the numerous advantages they offer, such as simple configuration, low-profile, compact size, low cost, and easy integration into portable devices [1,2]
The antenna design consists of four identical microstrip line-fed antenna elements, and the circular polarization is achieved using the protruded hexagonal stubs
The compact size helps in easy integration of the antenna into wireless communication devices with limited space constraints

Summary

Introduction

The increasing demand of planar antennas for wireless applications is due to the numerous advantages they offer, such as simple configuration, low-profile, compact size, low cost, and easy integration into portable devices [1,2]. They can be utilized for rapid communication applications, which involves a high transmission rate, for example, peer-to-peer data transfer and short-range wireless transmissions [3,4]. UWB antennas are commonly used for tracking objects and finding their accurate location. These antennas use short pulse methods to Sensors 2020, 20, 1174; doi:10.3390/s20041174 www.mdpi.com/journal/sensors

Methods

Discussion

Conclusion