Multiple sector ring monopole antennas

Due to the growing frequency spectrum demands in the wireless communication, multiband and wideband monopoles are a recent topic of interest. In these paper we have proposed a modified version of multi-band multiple ring monopole antennas as an improvement of the fractal Sierpinski gasket and the circular disk monopole. The antenna was simulated and measured. As seen in the simulation and experimental measurement the results are in good agreement, and compared with a classical multiband multiple ring monopole antennas, shown a similar multiband behaviour for the low frequency and a little improvement of the property for the high frequency.