Passive and semipassive RFID tags do not use a radio transmitter; instead, they use modulation of the reflected power from the tag antenna. Reflection of radio waves from an object has been a subject ...

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 ...

Radio frequency identification is the next wave in the evolution of computing. Essentially, it’s a technology that connects objects to Internet, so they can be tracked, and companies can share data ...

Global brands will pilot a passive RFID tag from PulpaTronics that transmits a unique ID when interrogated, but without a chip or metal-based antenna. Research out of the U.K. has led to a startup ...

Let's summarize the message of the last couple of sections. To transmit to a tag, a reader uses amplitude modulation to send a series of digital symbols. The symbols are coded to ensure that ...