Circular Polarization Diversity Implementation for Correlation Reduction in Wideband Low-Cost Multiple-Input-Multiple-Output Antenna

Ullah, Ubaid; Al-Hasan, Muath; Koziel, Slawomir; Mabrouk, Ismail Ben

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 0.78λ 0 × 0.55λ 0 = 0.42λ o 2 . 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 |S 21 | ≤ -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 +zdirection 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).

Citation

Ullah, U., Al-Hasan, M., Koziel, S., & Mabrouk, I. B. (2020). Circular Polarization Diversity Implementation for Correlation Reduction in Wideband Low-Cost Multiple-Input-Multiple-Output Antenna. IEEE Access, 8, 95585-95593. https://doi.org/10.1109/access.2020.2995723

• Journal Article Type: Article
• Acceptance Date: May 13, 2020
• Online Publication Date: May 19, 2020
• Publication Date: Jun 3, 2020
• Deposit Date: May 26, 2023
• Journal: IEEE Access
• Electronic ISSN: 2169-3536
• Publisher: Institute of Electrical and Electronics Engineers
• Volume: 8
• Pages: 95585-95593
• DOI: https://doi.org/10.1109/access.2020.2995723
• Public URL: https://durham-repository.worktribe.com/output/1173430