Highly Directive Microstrip Array Antenna with FSS for Future Generation Cellular Communication at THz Band

To establish a successful future generation cellular communication system in the Terahertz (THz) regime, there is a need to design high-directivity antennas, which will allow the signal to propagate beyond 0.1 km. Simultaneously, design wide bandwidth (BW) antennas to facilitate transmitting the information at a data rate up to 0.1 Tb/s. Two sets of microstrip array antennas have been designed, optimized, and simulated with the CST MWS simulator, in a hybrid fed with uniform amplitude distribution technique, the $$1{\text{st}}$$ one without frequency selective surface (FSS) feature and $$2{\text{nd}}$$ one with the FSS feature for further enhancing the antenna gain. To verify the simulation results of the $$1{\text{st}} - 2{\text{nd }}$$ antennas design, which simulated with the CST MWS simulator, these designs have been validated with the ANSYS HFSS simulator, and the simulation results obtained out of both simulators were close to each other. These antennas can establish a successful short-range 6G cellular communication system at the THz band.