Study of X-band plasma devices for shielding applications

This study presents novel switchable frequency selective surface (FSS) structures using encapsulated gas plasma elements. Simulations of geometric parameter sweeps show passband performance effects, and second-order model performance is compared with measured results. Average switchable attenuation can be increased from 24 dB for a second-order structure to 44 dB by adding another FSS and plasma element layer. These results suggest that switchable large-area plasma-based structures are practical for electromagnetic shielding applications in extreme environments.