An active tag can communicate with other active tags with or without the
presence of an interrogator. It does not communicate with passive or semi-passive
tags. An active tag can be designed to broadcast its data using broadband or
spread-spectrum technologies to enhance its data communication performance.
It can be set to a sleep mode in which it uses only a small amount of
power and does not transmit data.When it receives a specific signal, it awakens
and transmits its data. This reduces the power usage from the battery and extends
battery life.