An Ultra-Wideband SSL-FSS with Band Reject and Flexible Characteristics for Radome Applications

This work aims to synthesize a Frequency Selective Surface (FSS) with Band-reject characteristics over an ultra wideband operating range. A Swastika-Square-Loop (SSL) based FSS unit cell was designed to block the WiFi-6E, X and Ku-Bands. The designed conformal periodic structure provides band reject operation over a bandwidth of 12.78 GHz in the intended frequency range. The study of various bends conditions and the change in performance characteristics was studied and a regression based statistical analysis was carried out to establish a relationship between performance characteristics and bend radius. This proposed prediction model would enable the ready use of SSL-FSS based radome for various conformal applications like military equipment or Unmanned Aerial Vehicle (UAV).