A planar monopole antenna with DGS for bandwidth enhancement and U-slot for band-notch characteristics

In this paper a planar monopole antenna with DGS have been presented for enhancing the bandwidth along with an U-slot for obtaining band notch characteristics. A circular patch antenna of radius 6mm has been placed over FR4 substrate with 5mm ground plane on the back side. The antenna operates in UWB with VSWR<2 from 4.1GHZ to 11.65GHz. There is an U-shaped slot in the patch which is used to remove 5.1–5.9 GHz frequency band used for WLAN application. The VSWR and radiation pattern of the antenna has been presented for UWB applications.