High Angle Stability Frequency Selective Surface Design and Simulation

Frequency Selection Surface has been successfully used in radar radome design with low radar cross section. In this paper, a double-layer frequency selective surface structure with Ku band insensitive to large angle and polarization is designed. Based on the physical structure of FSS, the equivalent circuit model is established, and the upper and lower layers of the model can be regarded as two gristable square loops. The electromagnetic simulation software HFSS is used to analyze the designed model. Finally, a waveguide slot antenna is designed to verify the designed FSS.