3D frequency selective surfaces with close band spacing

The transmission and reflection characteristics of a dual cylinder 3D Frequency Selective Surface (FSS) is discussed in this paper. A simulation based investigation shows that the length of the cylinder has significant effect on the stop band frequency selective characteristics of the FSS. This can result in a closely spaced band pass and band stop response. A comparison is drawn to the introduction of dielectric materials into a single 3D cylindrical FSS.