Figure 1
From: Broadband Frequency-Selective Spoof Surface Plasmon Polaritons on Ultrathin Metallic Structure
Schematic picture of the ultrathin metallic frequency-selective structure, in which the yellow part is metal (modeled as copper) and the dark gray part is thin dielectric substrate.
The length of each part is l1 = 10 mm, l2 = 60 mm and l3 = 123 mm.
