Flexible CPW-Fed Circular Ring Antenna on Multilayer PDMS+ULTRALAM 3850HT Substrate for the Wearable Applications

This study aims to develop the flexible antenna fabricated on PDMS + ULTRALAM 3850HT Laminate $(25 \mu \mathrm{m}$ thin substrate) for the wearable sensing applications. A Coplanar Waveguide (CPW) transmission line having in-plane ground and signal conductor, feeds the circular ring antenna. The thin Copper of PCB surface acts as the conducting material, whereas multilayer thin polydimethylsiloxane + ULTRALAM 3850HT is used as the flexible substrate. A comparison of experimental and simulation results is presented, along with the results of antenna after wearing on the wrist for wearable sensing applications.