A printed rectangular monopole antenna (PRMA) with coplanar waveguide (CPW)-fed is designed for wideband dual frequency application. A proposed monopole antenna which has a size of 31.9 x 33 mm2, is fabricated to work on a substrate (FR4 lossy) that has the relative permittivity of 4.4 and a thickness of 1.6 mm with CPW-fed in the frequency range of 6 - 16 GHz. Simulation results such as impedance bandwidth are presented and discussed. Simulation results have been verified with good agreement. The parameters which affect the performance of the antenna characteristics are investigated in this paper.