BI-DIRECTIONAL AND MULTI-FREQUENCY RF SIGNALING SYSTEM

摘要

There is described herein an active bidirectional tag for use in an RF signaling system for real-time and non-real time localization. The tag has a first antenna that operates at a first frequency and a second antenna that operates at a second frequency. The two antennas allow the tag to perform more than one function concurrently, and to provide different ranges of communication between the two antennas. The tag is low cost, low power, and multi-use.