Design of UWB Antenna for Short Distance Wireless Communication System

This paper presents a study on simplest printed antenna for various ultra-wideband (UWB) based applications. The gap between height of ground plane and lower edge of patch along width is varied to observe the magnitude of S11 in the UWB frequency range for the appropriate antenna dimensions. The proposed antenna exhibits a 10 dB impedance bandwidth from 3.1 to 10.5 GHz, which constitutes about 108.82%. The antenna radiates omni directionally in the radiation patterns plane over the UWB band defined by Federal Communication Commission. The proposed antenna has a compact substrate size of 50 mm by 50 mm and 1.6 mm thickness with relative permittivity of 4.4.