▎ 摘　　要

In this paper, a four-leaf clover-shaped reconfigurable patch antenna based on graphene is presented. The antenna configuration is designed in such a way that each of the different parts of the antenna structure is impacted by chemical potential variations and as a result, can create a decisive radiation performance in the far-field for the designed antenna. The principal and ultimate goal of designing this structure is to control the patch antenna polarization simply by making variations in the Fermi energy level of the layers of graphene while the physical configuration of the designed antenna remains constant. Therefore, it is feasible to obtain an antenna structure with optimal matching in the frequency domain of 0.64 through 0.69 THz. Polarization control is possible in three ways: right-hand circular polarization, left-hand circular polarization, and linear polarization. The axial ratio is got below 3 dB in the frequency range of 0.6 through 0.69 THz. While it is a suitable circular polarization. The significant idea is that the physical configuration of the designed antenna has made it possible to achieve circular polarization by adding layer patches.