LOW FREQUENCY TAG AND SYSTEM

摘要

An active two way radio tag (101) used for tracking assets, people or livestock operates below 1 MHz and includes an integrated circuit (3) operable to generate and transmit data signals at a frequency below 1 megahertz, a timing circuit (e.g. crystal) , for controlling the frequency, and a battery (LR44) or other energy source operable to energize said integrated circuit and said timing circuit. The active tag may further include a data storage device (e.g. a static or dynamic memory) operable to store data identifying the tag.