A dual band co-planar waveguide fed Z-U-T-S shaped monopole antenna is proposed. The antenna is fabricated on an h = 1.6mm FR4 epoxy substrate with dielectric constant er = 4.3 and loss tangent tan d = 0.008. The size of the radiating element is 15.9 X 11.4 mm2. The antenna operation presents attractive characteristics; each monopole is independently optimized to the resonant frequency and the impedance bandwidth without affecting those of other bands.