In this paper, a simple method of enhancing the bandwidth Bell-shaped UWB Antenna for indoor localization systems is proposed. Therefore, modified version bell-shaped Ultra-Wide Band (UWB) antenna presented. The proposed printed on low-cost FR-4 substrate 21×27×1.6mm3 size. It composed radiating patch and multi-slotted ground plane. measured results show that has an impedance about 11.2GHz rang...