Graphite‐Inspired Dumbbell‐Shaped Single Radiator MIMO Antenna for THz Regime: A Frequency Switchable/Reconfigurable Approach

A graphite‐inspired frequency switchable/reconfigurable MIMO (Multiple‐input multiple‐output) antenna is implemented for THz applications. Reconfigurability in the frequency response is achieved by layering the graphite in the slot of Antenna‐2. The proposed antenna provides isolation better than 30 dB, high efficiency, and reasonable gain in the resonating band. An impedance bandwidth of 11.5% (2.04–2.29 THz) & 15.6% (4.06–4.74 THz) for Antenna‐2 and 12.5% (3.53–3.99 THz) for Antenna‐3 is achieved. Both the presented antennas demonstrate excellent diversity performance like Envelope Correlation Coefficient (ECC) < 0.03, Directive Gain (DG) > 9.95 dB; Total Active Reflection Coefficient (TARC) < −10 dB, and Channel Capacity Loss (CCL) < 0.35 bits/s/Hz, that can be incorporated into biomedical applications, high‐frequency telecommunications, sensing applications, biological and astrophysical insights.