An RFID tag's mobility can be increased and cost can be decreased by using high-performance mobile power antennas instead of battery powered tags. Disclosed are some power antennas that include a half wave rectifier, a full wave rectifier, and a voltage multiplier. These antennas can be cascaded to boost...http://www.google.com/patents/US6400274?utm_source=gb-gplus-sharePatent US6400274 - High-performance mobile power antennas
