Design and Analysis of Wideband Flexible Self-Isolating MIMO Antennas for Sub-6 GHz 5G and WLAN Smartphone Terminals

• DOI: 10.3390/electronics10233031
• Publication Date: 2021-12-06T01:59:33Z
• Authors: Jayshri Kulkarni; Abdullah G. Alharbi; Arpan Desai; Chow-Yen-Desmond Sim; Ajay Poddar
• Keywords: Diversity gain; Wideband

A single radiator that is a part of four-port diversity Multiple-Input Multiple-Output (MIMO) antenna design composed four octagonal rings embedded between the two opposite sides T-shaped conductive layer surrounded by inverted angular edge cut L-shaped and E-shaped structures. The radiators are placed at corners with common ground center smartphone to form four-element mobile MIMO antenna. printing carried out on flexible polyamide substrate (dielectric constant = 3.5 loss tangent 0.0027) dimensions 70 × 145 0.2 mm3. wide impedance bandwidth (84.12%) 2.39 5.86 GHz achieved for all radiators. compact size along their placement enables proposed occupy much less area while preserving space 2G/3G/4G antennas. antennas results in self-isolation elements achieving isolation greater than 17.5 dB desired operating bands. Furthermore, besides showing high efficiency 85% adequate gain above 4 dBi, good performances such as Envelope Correlation Coefficient (ECC) 0.05, Diversity Gain (DG) 9.8 dB, Mean Effective (MEG) −3.1 Channel Capacity 21.50 bps/Hz, Total Active Reflection (TARC) below −10 effect bending X Y-axis performance also analyzed where decent observed. This makes potential candidate be deployed future smartphones.