Design of a high-sensitivity and high-Q microwave sensor based on H-fractal metasurface structure

This paper proposes a metasurface based on H-fractal unit structure, which exhibits three transmission resonance peaks. The simulation results show that these peaks are very sensitive to samples with different refractive indexes. The biggest frequency shift of these resonant peaks is about 2.6 GHz when the refractive index of samples changes by 1 and the quality factor(Q) values of the second and the third peak are up to 191.55 and 179.40 respectively, which has great application potential in the field of microwave sensing because its high-sensitivity and high-Q.