Patent Number: 7,612,674

Title: Radio frequency identification system

Abstract: A reader emits a low frequency signal to energize a RFID tag. The RFID tag responds with a high frequency signal. An antenna on the RFID tag functions as a resonant circuit upon receiving the low frequency signal to power up the RFID tag. In one embodiment, the high frequency signal is a millimeter frequency signal.

Inventors: Shintani; Peter (San Diego, CA)

Assignee: Sony Corporation

International Classification: G08B 13/14 (20060101)

Expiration Date: 1/03/02017