▎ 摘　　要

We suggest a new graphene-based four-port circulator for THz applications that consists of two parallel graphene waveguides coupled to an elliptical graphene resonator between them. The graphene elements are deposited on a dielectric substrate. An external constant magnetic field is applied normal to the resonator. The frequency response of the circulator obtained from numerical simulations performed with COMSOL Multiphysics software is in good agreement with those obtained from the ad hoc temporal coupled-mode theory. The analysis shows that the bandwidth of the circulator is about 5.7% around the central frequency 5.03 THz with the applied constant magnetic field of 0.8 T.