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Compact four-port vertically polarized UWB monopole antenna for MIMO communications

Premalatha J. (Department of Electronics and Communication Engineering, Tagore Engineering College, Chennai, India)
Sheela D. (Department of Electronics and Communication Engineering, Tagore Engineering College, Chennai, India)

Circuit World

ISSN: 0305-6120

Article publication date: 6 July 2020

Issue publication date: 8 June 2021

240

Abstract

Purpose

This paper aims to present the design of a compact vertically polarized four-element UWB antenna suitable for MIMO communications.

Design/methodology/approach

The unit cell antenna is constructed using a square ring radiator excited through a stepped impedance feed. The proposed antenna covers the Ultra-wideband (UWB) spectrum ranging from 2.2 to 12.3 GHz. The isolation between the unit cell antennas in the array is enhanced using a simple microstrip line resonator. The decoupling element is connected to the ground through a via.

Findings

The proposed scheme offers at least 16 dB improvement in the port-to-port coupling. Furthermore, the four-element antenna array is constructed using a specific interlocking scheme. The proposed antenna array’s Multiple Input Multiple Output (MIMO) performance metrics are analyzed.

Originality/value

By suitably selecting the excitation port, directional radiation patterns can be realized. The combined radiation pattern covers 360 degrees. A prototype antenna array is fabricated, and the simulation results are verified using real-time experiments. The proposed antenna is a suitable candidate for shark fin housing in automotive communications.

Keywords

Citation

J., P. and D., S. (2021), "Compact four-port vertically polarized UWB monopole antenna for MIMO communications", Circuit World, Vol. 47 No. 2, pp. 129-137. https://doi.org/10.1108/CW-04-2020-0055

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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