Circular polarization diversity implementation for correlation reduction in wideband low-cost multiple-input-multiple-output antenna

Ubaid Ullah; Muath Al-hasan; Sławomir Kozieł; Ismail Mabrouk

doi:10.1109/access.2020.2995723

Circular polarization diversity implementation for correlation reduction in wideband low-cost multiple-input-multiple-output antenna

Abstract

In this paper, a multiple-input-multiple-output (MIMO) antenna featuring circular polarization diversity, and designed on a common coplanar ground is presented. The proposed antenna design utilizes a coplanar waveguide (CPW) feeding technique with three parallel coplanar ground planes, and two feedlines in-between. For circular polarization (CP), quasi-loops are created by etching slots on the outermost ground planes. With this configuration, circular polarization diversity is induced in the MIMO antenna with the left-hand CP (LHCP) from one antenna and the right-hand CP (RHCP) from the other. The total footprint of the antenna radiator is only 0.78λ0 × 0.55λ0 = 0.42λ02. Experimental results show perfectly overlapping impedance and axial ratio bandwidths of 39.3% (4.5 GHz to 6.7 GHz). In addition, average in-band isolation |S21| ≤ –15 dB without any added complexity or active circuit elements. The peak realized gain of the antenna is 5.8 dBic with broadside radiation pattern in the +z- direction and envelope correlation coefficient (ECC) of 0.005. The antenna is suitable for multiple applications in the C-band that includes WLAN (5 GHz, 5.2 GHz and 5.8 GHz) and WiMAX (5.5 GHz).

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Keywords

MIMO ANTENNA , CIRCULAR POLARIZATION , POLARIZATION DIVERSITY , COPLANAR WAVEGUIDE , CIRCUIT OPTIMIZATION

Details

Category:: Articles
Type:: artykuły w czasopismach
Published in:: IEEE Access no. 8, pages 95585 - 95593,
ISSN: 2169-3536
Language:: English
Publication year:: 2020
Bibliographic description:: Ullah U., Al-Hasan M., Kozieł S., Mabrouk I.: Circular polarization diversity implementation for correlation reduction in wideband low-cost multiple-input-multiple-output antenna// IEEE Access -Vol. 8, (2020), s.95585-95593
DOI:: Digital Object Identifier (open in new tab) 10.1109/access.2020.2995723
Verified by:: Gdańsk University of Technology