The design of a circularly polarized, broadband planar monopole antenna is proposed in this work. The aim of the planar monopole antenna is to deliver maximum bandwidth with respect to radiation performance. In this work, the planar monopole antenna used is rectangular patch. The antenna gain is improved by correctly slicing a horizontal slit and placing a vertical stub on the ground plane. FR4 epoxy material with a dielectric constant ( ) of 4.5 is suggested for use in the design of the CPW-Fed Circularly Polarized planar monopole antenna. The suggested planar monopole antenna exhibits the best performance at 5 GHz, with a return loss of -33.504 dB and an antenna gain of 8.231 dB at the resonance frequency.