This paper presents a new method to simulate the
properties of Frequency Selective Surface (FSS) composed of planar H-shaped
fractals structure exhibiting multiple band gaps of electromagnetic waves.
The FSS sample can be easily fabricated as that of the Printed Circuit Board
(PCB). The electromagnetic characteristics of this H-shaped fractal
structure were studied mainly by numerical simulation based on Finite
Integration Technique (FIT). The simulation results present a direct image of
surface currents when certain frequency electromagnetic waves incident on
the surface of the sample, which is in a considerably good agreement with
the experimental results. Based on the comparison of simulated and
experimental result it is suggested that the planar H-shaped fractals
structure has quasi-periodic multiple band gaps and the size can be
significantly smaller than the relevant electromagnetic band gap wavelength.