Dual-band fractal antenna with concentric ring-shaped defected ground plane structure

Abstract

This paper proposes the design of improved dual-band micro-strip antennas through the use of concentric rectangular fractals in the patch, and a ground plane with a concentric ring-shaped defected ground plane structure, located at the bottom of the same antenna. This design technique constitutes the fractal antenna with concentric ring-shaped defected ground plane structure. The design will be undertaken in two successive iterations. The antennas proposed in this paper have dual-band resonances at 1.7375 GHz and 2.0375 GHz for the 1st iteration, and 1.7625 GHz and 2.075 GHz for the 2nd iteration, with -10 dB impedance bandwidths of 72.5 MHz and 65.5 MHz for the 1st iteration, and 58.8 MHz and 66.8 MHz for the 2nd iteration. The designed antennas can be used for telecommunication and satellite applications. Keywords— Defected, fractal, micro-strip, multi-band.