Multiband and high gain meandered metamaterial THz MIMO antenna for highspeed wireless communication applications

The need for high gain and multiband THz antenna is increasing day by day as the advancement in wireless technology and high-speed communication devices are occurring at a fast pace. We have proposed a novel Meandered S-Shaped metamaterial MIMO antenna design that is operated at THz frequencies and gives high gain, multi-band, and high isolation results. Four different bands with impedance bandwidths of 5.8% (6.6-7 THz), 1.7% (7.31-7.43 THz), 6.5% (7.82-8.35 THz) and 5.12% (9.12-9.6 THz) are achieved for this design in the frequency range of 6-10 THz. The highest gain of 9.76 dBi and isolation between the two radiating elements is - 56 dB are achieved for the proposed antenna. The antenna parameters are also investigated for its optimization. The different parameters are varied to find out the optimized design. The substrate thickness, metasurface thickness, and meandered slit are optimized to get better gain and bandwidth results. The S-shape MIMO design gives mean effective gain & LE; - 3.0 dB, total active reflection coefficient & LE; - 10.0 dB, diversity gain & AP; 10 dB, channel capacity loss < 0.5 bps/Hz/s and envelope correlation coefficient < 0.01 for the investigated frequency range. A comparison with published similar designs is also given. The proposed design with its high gain and multiband nature can be applied to High-speed wireless communication devices.