I. Introduction
The Ultra-wideband (UWB) is a radio technology that can share information over a large portion of the wireless spectrum using very low energy levels. UWB has been used in non-cooperative radar image analysis. The majority of recent applications are focused on sensor systems, accurate location finding, and tracking. High-end smartphones began to include UWB support [1]-[3]. The frequency range designated for UWB systems is from 3.1 GHz to 10.6 GHz. The sub-narrow bands coexist within the UWB spectrum such as Mid-band (3.4-3.8 GHz), Wireless LAN (5.15-5.85 GHz), and Satellite downlink band communication systems are creating interference. Therefore, there is a huge demand for UWB antennas with stop-band features. The addition of filters to the antenna causes an increase in volume. Therefore, notch antennas with modifications in basic design can avoid this issue.