Simulation design of an X-band high isolation circulator

In this paper, a X-band waveguide circulator operating at 11 to 13 GHz is designed. The parameters of the circulator are optimized by HFSS (high-frequency electromagnetic simulation software). Isolation is a key indicator of the circulator. The simulation results show that the isolation of the circulator in the working frequency band is greater than 30dB, and the relative bandwidth exceeds 16%. In addition, the voltage standing wave ratios of the three ports are all less than 1.1. Therefore, the circulator presented in this paper can provide a reference scheme for the design of high isolation circulator.