Planar Antenna Array with Double-Ring Patch Resonators for 6G/THz Wireless Systems

This work presents a compact four-element array antenna engineered to support the stringent requirements of terahertz (THz) and sixth-generation (6G) wireless communication systems. The antenna architecture incorporates double-ring patch resonators with discrete excitation mechanisms and is realized on a low-loss <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$5\ \mu \mathrm{m}$</tex> Rogers 5880 dielectric substrate, selected for its favorable performance at high frequencies. The array is designed to operate optimally at a center frequency of 5.5 THz, delivering highly directional radiation characteristics that enhance beam control and spatial signal concentration. A comprehensive analysis encompassing key electromagnetic performance indicators such as S-parameters, radiation patterns, gain, and overall efficiency has been conducted. The resulting data indicate that the proposed design achieves efficient energy radiation and stable operation, underscoring its potential as a strong candidate for integration into next-generation THz-enabled 6G communication infrastructures.