This work presents the design of a flexible, low-profile radiator for wearable applications. The ability to put the antenna on the body is an essential requirement for on-body applications. Jeans material with 0.6 mm thickness, the tangent loss is 0.02, and is 1.6 is used to design with a size of 23×25×0.6 mm3 . A fan shaped patch is integrated on the substrate with a defected ground structure (DGS) is printed on back of substrate, which is used to achieve a bandwidth from 3.4-4.2 GHz for |s11|<-10 dB with an efficiency 96%, operated for 3.3-3.6 GHz (WiMAX), and 3.7-4.2 GHz (C-band) applications.