This paper investigates the effect of antenna-body gap in terms of reflection coefficient, real and imaginary part of input impedance, group delay, Voltage. In this work, a single band notched circular ring monopole patch antenna is presented and examined for ultra-wideband (UWB) applications. Its frequency of operation is and GHz. In this thesis, two types of slot antennas are studied, designed and characterized for the purpose of achieving Ultra-wideband (UWB) capabilities when in. The dimensions of the S-UWB patch antenna are 27 mm × 27 mm × mm.