High Q-factor frequency selective surfaces based on coplanar waveguide transmission line

In this paper, we introduce coplanar waveguide transmission line resonators as bandstop frequency selective surfaces, which exhibit very high Q-factors and low passband losses. By simulating the influence of design parameters, we can obtain the bandstop frequency selective surfaces resonating at specific frequency point. Moreover, the calculated sharp transmission response shows its potential applications in the sensing of refractive indices at free space.