Active RFID Without a Battery
August 5, 2014 | Terry Sharrer
Until now, RFID systems have come in two forms: unpowered passive tags that have to pass a near a reader to communicate their location, and battery-powered active tags that transmit their location without movement. Passive tags are cheap; active tags are expensive, but more helpful in finding things in a hurry. This story describes “iFind,” an active tag that collects power from ambient electromagnetic energy rather than relying on a battery. Currently, its transmission range is about 50’, but that might be strong enough to locate an IV pump secreted in a hospital broom closet. MORE
Image Credit: iFind and MedCityNews.com