Jennifer Hicks posted an interesting article on forbes.com about a new discovery to power implantable medical chips and devices which are intended to treat illness or relieve pain without drugs. Engineers at Stanford University have been working to rid these medical devices of batteries and recharging systems, which have restricted the use of these devices for years.
Ada Poon, assistant professor of electrical engineering, had the idea to wirelessly power or recharge internal devices with an external power source using electromagnetic waves. Her challenge in using electromagnetic waves was finding a middle ground between the two extremes—far-field and near-field. Poon needed to accomplish the distance of far-field waves and the safety of near-field waves in order to make the transfer from air to skin, and successfully power an internal device. By creating a power source using a mid-field wireless transfer, she was able to do just that.