Highly flexible strain sensor based on pop up dipole antenna for on-body applications

摘要

Soft electronic systems are intensively desirable due to their similar mechanical properties to human skin. Technological advances in flexible skin-attachable strain sensors over the last decade have made them attractive for medical applications, in particular, out-of-the-clinic health monitoring. Here we report a novel highly stretchable strain sensor based on a compressive buckling technique for on-body applications. Our suggested sensor is able to measure 0 to 60% strain with the frequency shift in the range of 2.4 GHz to 5 GHz while keeping the on-skin antenna gain greater than ?11 dBi. Finite Element Analysis (FEA) using COMSOL Multiphysics? 5.3a was adopted to analyse the buckling behaviour of the 2D metallic precursor as well as the antenna performance. Numerical results are in good agreement with the experimental data.