Passive RFID tags doesn’t not require internal power source, instead it is powered by electromagnetic energy transmitted from an RFID reader. Passive RFID tags are used for applications such as file tracking, tool tracking, asset tracking, supply chain management, smart labels, and more. The lower price point per tag makes employing passive RFID systems economical for many industries.
Passive RFID tags do not all operate at the same frequency. There are three main frequencies within which passive RFID tags operate. The frequency range, along with other factors, strongly determines the read range, attachment materials, and application options.