An application of fractal geometry to design the microstrip circuits

The fractal geometries such as Koch curve, Sierpinsky gasket, and Hilbert curve, etc. have been widely studied and applied to design several microwave devices, such as antennas, frequency selective surfaces (FSS), and photonic band gap (PBG) devices. There are several advantages of these fractal devices including reduction of resonant frequencies, smaller size and broadband width. In this paper a critical study has been presented on application of fractal geometry to design the microstrip antenna, microstrip filters and frequency selective surfaces.