Tunable Terahertz MIMO/Self‐Diplexing Dielectric Resonator Antenna

ABSTRACT A tunable terahertz (THz) multi‐input, multi‐output (MIMO) dielectric resonator (DR) antenna (DRA) with the self‐diplexing ability is implemented. Two separated annular disc DRs with the top coated graphene material connected with two individual ports. And, these graphene coating can be connected to the separate DC power supplies to find the tunable response through individual port. The narrow‐intensified resonance spectrum of annular disc DRs operating with the mode can provide the highly sensitive tunable MIMO response. This can also help in offering the tunable self‐diplexing capability to antenna. The usage of DRs can provide the antenna with the high gain and efficiency in the THz frequency range. The antenna operation is validated using the circuit theory approach. Moreover, antenna operation is validated to work with the four ports and radiators, which can provide the operation with four port MIMO or self‐multiplexing capability. The usage of array of the four radiators enhances the directivity significantly by reducing the minor lobe and confining the radiated power as in pencil beam. The multiport antenna operation is validated by calculating envelop correlation coefficient and diversity gain which remain around 0.06 and 10 dB in the passband, respectively. These prove the proposed antenna suitable for working in the multiport systems.