How Does RFID Tag Technology Work?

There are 2 main types of RFID tags: “passive” and “active.”

(1):     Passive RFID tags are powered by a stationary or mobile RFID reader that emits an electromagnetic field. The tag’s antenna harvests energy from this field to release a signal to the reader.
           The frequency of the reader must match the frequency of the tag. For passive tags, there are low-, high- and ultra-high frequencies standardized (LF, HF, UHF).

(2):    Active RFID tags use a battery to broadcast via BLE (Bluetooth Low Energy) or WiFi.