Wireless power transfer to a cardiac implant

We analyze wireless power transfer between a source and a weakly coupled implant on the heart. Numerical studies show that mid-field wireless powering achieves much higher power transfer efficiency than traditional inductively coupled systems. With proper system design, power sufficient to operate typical cardiac implants can be received by millimeter-sized coils. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4745600]