(Left) Prototype of a CASPER powered wound monitoring gauze pad worn on the user’s leg. The bed sheet acts as the body electrode, while the blanket acts as the floating electrode. (Right) The RX floating and body electrode feeds the 13.56MHz coupled signal into a multi-stage diode rectifier network for AC to DC conversion. A Zener diode prevents the power storage from over-voltage. Depending on the application, the power storage can be a simple capacitor or a solid state battery with a BQ25504 charge controller. A load can then be run from the stored DC power.