In the previous article, “The principles of RFID: Active Tags,” we discussed a classification of RFID tag called the active tag. Even though the active tag has many applications, it does not get as ...

Tags use very little energy, as little as 500 miliwatts (a milliwatt is equal to one thousandth of a watt). The tag’s antenna can only capture a tiny portion of the energy of the reader. Much of it ...

Active RFID -- No governing standards, being developed -- Transmit energy often in 400 MHz, 900 MHz and 2.45 GHz ranges -- Requires onboard power source with large memory -- Can be read, or written to ...