Single-sided radiation of a fractal-shaped reconfigurable dual-band slot-ring antenna using electromagnetic band-gap surfaces

This paper provides a ground plane solution for the fractal-shaped reconfigurable dual-band slot-ring antenna by using the Electromagnetic Band-Gap (EBG) surfaces. The EBG surface is designed with an in-phase bandwidth from 1.7 to 3.0 GHz. A distance between the EBG and the antenna is selected to be 7. 5 mm. The EBG-backed reconfigurable slot-ring antenna operates at two frequency bands based on the status of the switches loaded on the antenna. The lower band is observed from 2.0 to 3.7 GHz while higher band is from 4.9 to 8.4 GHz. During both frequency bands, the backside radiation of the antenna is reduced by the EBG surface.