An optimizing procedure of the wireless power transfer link for an intraocular implantable device

This paper presents a design method and results of prototyping for the wireless power transfer (WPT) link used in intraocular implantable devices. In this kind of applications, the coil size is constrained strictly, which makes it hard to find an efficient configuration by only changing the coil geometry. Therefore, in our design, we took frequency into account as another design dimension to expand the design margin. We set up a WPT design flow using a novel scope of matching network and taking frequency as a variable parameter. Finally, we obtained a WPT coupling efficiency up to 63.9%.