Design and Analysis of UWB MIMO Antenna for Smart Fabric Communications.

Authors :: Govindan, Thennarasi
Palaniswamy, Sandeep Kumar
Kanagasabai, Malathi
Kumar, Sachin
Source :: International Journal of Antennas & Propagation; 12/21/2022, p1-14, 14p
Publication Year :: 2022
Abstract: This paper presents a flexible multiple-input, multiple-output (MIMO) antenna with ultrawideband (UWB) performance for smart clothing applications. The MIMO antenna is comprised of four octagonal-shaped radiators with several slots loaded into them, and it offers a frequency range of 2.9–12 GHz. The unit cell has a size of 0.26λ<subscript>0</subscript> × 0.164λ<subscript>0</subscript> × 0.014λ<subscript>0</subscript> and the MIMO antenna has a size of 0.48λ<subscript>0</subscript> × 0.48λ<subscript>0</subscript> × 0.014λ<subscript>0</subscript>, where λ<subscript>0</subscript> corresponds to the lowest operating frequency. The radiation and diversity performances of the antenna are evaluated, and the obtained metrics are envelope correlation coefficient (ECC) <0.045, diversity gain (DG) >9.9 dB, total active reflection coefficient (TARC) <−14 dB, and channel capacity loss (CCL) <0.13 bits/s/Hz. The bending analysis of the MIMO antenna is performed. The specific absorption rate (SAR) of the MIMO antenna is also investigated, and the obtained values are 0.229 W/Kg (4 GHz), 0.253 W/Kg (7 GHz), and 0.463 W/Kg (10 GHz). [ABSTRACT FROM AUTHOR]