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How do you power an implant? Surgical battery replacement is undesirable...
Ada Poon, an assistant professor of electrical engineering at Stanford, and doctoral candidates Sanghoek Kim and John Ho have demonstrated that it’s possible to construct a super-small implantable cardiac device the size of a 1.6 millimeter-wide cube.
The device uses gigahertz-frequency radio waves that can power extremely small devices five centimeters (1.96 in) inside the chest on the surface of the heart – a depth once thought impossible.
