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High isolation 4-element ACS-fed MIMO antenna with band notched feature for UWB communications

Published online by Cambridge University Press:  22 February 2021

Ahmed A. Ibrahim  and
Wael A. E. Ali Open the ORCID record for Wael A. E. Ali [Opens in a new window]
Ahmed A. Ibrahim
Affiliation:
Electronic Engineering Department, Minia University, El-Minia, Egypt
Wael A. E. Ali*
Affiliation:
Department of Electronics & Communications Engineering, College of Engineering and Technology, Arab Academy for Science, Technology and Maritime Transport (AASTMT), Alexandria, Egypt
*
Author for correspondence: Wael A. E. Ali, E-mail: [email protected]
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Abstract

In this paper, a compact 4-port band-notched multi-input-multi-output (MIMO) antenna with asymmetric coplanar strip (ACS) feed is presented for ultra-wide band (UWB) applications. The MIMO antenna is comprised of four semi-elliptical radiators with ACS feed for UWB applications and it is printed on inexpensive FR4 substrate of size 48 × 52 mm2 with ɛr = 4.4 and 1.6 mm height. The impedance characteristics of the suggested MIMO antenna ranges from 2.7 to 11 GHz with a band-notched behavior from 3 to 4 GHz to reduce the interception with WiMAX applications, and the isolation level over the achieved band is more than 20 dB between any two adjacent elements. Moreover, the radiation pattern of the proposed UWB antenna is almost omnidirectional with an average realized gain of 3.5 dBi over the entire achieved frequency band. The proposed ACS-fed antenna is confirmed by fabricating and measuring it's impedance and radiation characteristics. Finally, good consistency between simulation and measured outcomes is obtained confirming the validity of the MIMO antenna for real-life UWB wireless systems.

Keywords

ACS-fedMIMO antennaUWB communicationsWiMAXHigh isolation
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 14 , Issue 1 , February 2022 , pp. 54 - 64
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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