Design regular fractal slot-antennas for ultra-wideband applications

This paper presents design of fractal regular slots patch antennas for Ultra-wideband (UWB) applications. The proposed reference antenna is a monopole type of a rectangular radiator mounted on a dielectric substrate and fed by a microstrip feed line of 50 Ω characteristic impedance. Four different regular fractal slots configurations have been inserted randomly to the patch to modify the reference antenna characteristics and decrease the patch area. These new proposed four antennas configurations are investigated in terms of the antennas different parameters including impedance band-width, radiation patterns, gain, and group delay evaluation. The simulation results prove that the fractal slot configurations and positions create a filtering behavior in form of the mismatch band and band reject characteristics.