Characteristic Mode Analysis Based Design of a Sub-THz Slotted Patch Antenna for High-Speed Wireless Communication Networks

This study presents an innovative planar-slotted antenna design for optimal performance within the Sub Terahertz (THz) frequency band. With a complete ground plane and strategically positioned cross slots on the radiator, the antenna offers a precise center resonance at 0.3 THz and an excellent bandwidth of 29 GHz (0.286 to 0.315 THz). These cross slots induce disruptive yet beneficial local current channels, increasing impedance bandwidth. Having a footprint of 1200 μm x 750.9 μm x 80 μm, the antenna uses silicon dioxide (SiO
2
) as its substrate material. The Characteristic Mode Analysis provides valuable insights into the antenna's comprehensive behavior showing the effects of the cross slots on the current distribution. The simulated findings, which include a wideband S11 plot, radiation efficiency (85%), and a gain of 8db at the resonance frequency are in good agreement with the design specifications. The two-dimensional radiation pattern and gain characteristics show the antenna's spatial coverage capabilities, making it a promising solution for high data rate applications in the THz spectrum.