MULTI-ELEMENT COUPLER FOR GENERATION OF ELECTROMAGNETIC ENERGY

A wireless power transfer system and a method of wireless power transfer are provided. The wireless power transfer system comprises an external module (400) configured to transmit wireless power by manipulating evanescent fields outside of tissue to generate propagating fields inside the tissue and thereby generate a spatially focused field inside the tissue, and an implantable module (418a) configured to receive the wireless power from the external module, the implantable module comprising at least one of a sensor configured to sense a parameter of the tissue or a stimulator configured apply stimulation to the tissue.