RECONFIGURABLE GRAPHENE-BASED MULTI-INPUT-MULTI-OUTPUT ANTENNA FOR SIXTH GENERATION AND BIOMEDICAL APPLICATION

In this paper, a small MIMO antenna with a semi-hexagonal form is developed for use in terahertz applications. The suggested antenna consists of four radiating components printed on a Silicon Dioxide substrate that is 90 ×90 with a thickness of 10 µm. The radiating components have been positioned in an orthogonal orientation to produce excellent isolation and miniaturization of the MIMO system. The suggested MIMO antenna works for all the (0.1-10)THz bands with different values of chemical potential with wide impedance bandwidth (S11 ≤ -10dB) in the frequency range of 2.4 to more than 10 THz, With a co-reflection coefficient less than -20 dB over the whole operating band, with a return loss -50 dB. The MIMO antenna has a maximum gain of 8.4 dBi and a steady diversity performance across all the working bands. According to the high-performance characteristics, the suggested graphene MIMO antenna design can be used for many applications in the THz band, including 6G high-speed wireless communication systems, security scanning, biomedical applications, IoT (Internet of Things), and sensing.