Highly Isolated Y-shape Two-Port THz Antenna Based on Hybrid Decoupling Structure

The fascinating properties of terahertz (THz) waves piqued the interest of numerous researchers in THz technology. This paper introduces a Y-shaped two-port THz antenna operating from 0.87-1.9 THz. The proposed THz MIMO antenna has an overall geometry of 600×1400×20 µm3. The proposed THz MIMO antenna is designed on a 20 µm thick polyimide substrate with a relative permittivity of 3.5. To realize the appropriate operating frequency and isolation antenna's radiator and ground plane are adjusted by integrating parasitic elements. The isolation among the inter port of the antenna is enhanced to better than 22 dB using a hybrid decoupling structure comprised of a neutralization line and defected ground structure. MIMO diversity features of the proposed antenna are examined and found to be ECC <0.001, DG˜ 10 dB, TARC <-10 dB, CCL<0.2 bps/Hz, and MEG<-3 dB across the impedance bandwidth of the antenna. The diversity parameters result ensures that the proposed MIMO design is well suited for wireless communication applications.