Flexible miniaturized UWB CPW Π-shaped slot antenna for wireless body area network (WBAN) applications A flexible microstrip antenna printed on a Kapton Polymide substrate, excited by a CPW feed line, and operated in S-band at 3.5GHz, is successfully validated. Unlike previous flexible antennas, this structure offers a very thin thickness (0.16mm) with overall dimensions of 36×25 mm2 that assure an easy integration into clothes and wireless body area network (WBAN) systems. Modeling and performance evaluation of the proposed antenna in term of return loss, voltage standing wave ratio, radiation pattern, and current distribution have been carried out using CST-MW STUDIO Software.