Design of curved frequency selective surface with high roll off

In this article, band pass cylindrical double-layer frequency selective surfaces (FSSs) are investigated using method of moment (MOM). Plus- shaped slots are used to design the FSSs. The dielectric substrate is considered as air. A good bandwith and sharp roll off are achieved for curved FSS. Theoretical and measured investigations have been done by FEKO simulator and microwave test bench setup, respectively.