A DGS-Based Ultra Wideband THz MIMO Antenna for Wireless Communication

The increasing need for high data rate communication and sophisticated imaging technologies has spurred the exploration of ultra wideband Terahertz (THz) Multiple-Input Multiple-Output (MIMO) antennas. The circular segment added circular two-port THz antenna that operates between 2.9 and 11.1 THz is presented in this work. The proposed THz MIMO antenna has an overall geometry of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">20× 46× 2μ m³</tex> . The suggested THz MIMO antenna is made on a polyimide substrate that is 2 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">μ m</tex> thick and has a relative permittivity of 3.5. The antenna's radiator and ground plane are modified by integrating parasitic components to accomplish the proper operating frequency and isolation. The antenna's interport isolation is improved to exceed 20 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">dB</tex> by employing a redesigned ground plane as a decoupling structure. Upon examination, the proposed antenna's MIMO diversity properties are determined to be ECC <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$< 0.0$</tex> , DG <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">≈ 10dB</tex> , TARC <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">< -10dB</tex> , CCL <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">< 0.2bps/Hz</tex> , and MEG <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">< -3dB</tex> over the antenna's impedance bandwidth. According to the diversity parameters result, the suggested MIMO architecture is suitable for applications involving wireless communication.