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Low-profile, wideband dual-polarized 1 × 2 MIMO antenna with FSS decoupling technique

Published online by Cambridge University Press:  26 May 2021

B. Anudeep Open the ORCID record for B. Anudeep [Opens in a new window] ,
K. Krishnamoorthy  and
P. H. Rao
B. Anudeep*
Affiliation:
Electronics and Communication Engineering Department, National Institute of Technology Karnataka, Surathkal, Mangalore, India
K. Krishnamoorthy
Affiliation:
Electronics and Communication Engineering Department, National Institute of Technology Karnataka, Surathkal, Mangalore, India
P. H. Rao
Affiliation:
Microwave Communication and Antenna Division, SAMEER-Centre for Electromagnetics, Chennai, India
*
Author for correspondence: B. Anudeep, E-mail: [email protected]
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Abstract

A low-profile, wideband dual-polarized 1 × 2 multiple-input-multiple-output (MIMO) antenna with frequency selective surface (FSS) decoupling technique is presented. Low profile is realized with two different artificial magnetic conductor (AMC) cells out of which one operates at 3.5 GHz and other with dual band at 3.1 and 4.5 GHz. The proposed antenna height is maintained at 0.125λ0 which is significantly reduced when compared with the conventional perfect electric conductor (PEC) ground plane. Wideband dual polarization is enabled by two pairs of bow-tie antenna elements surrounded by a square ring placed in the orthogonal orientation. To mitigate the near-field coupling in 1 × 2 MIMO an FSS wall is constructed with wide band stop characteristics from 2.85 to 4.75 GHz. Measured results show by inserting FSS wall vertically, coupling reduction is improved by 27 dB over the existing coupling and the antenna exhibits a bandwidth of 57.14% (2.95–4.95 GHz) for VSWR<2 with port isolation of more than 25 dB for entire band of operation.

Keywords

Artificial magnetic conductordual polarizationfrequency selective surfacelow profileMIMOwideband
Type
Antenna Design, Modeling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 14 , Issue 5 , June 2022 , pp. 634 - 640
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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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