Impinj

RFID has been around a long time. But things have changed rapidly in the last two years, and new opportunities abound. Older formats use relatively low frequencies, whereas a resurgence of interest in RFID has attended the use of ultrahigh frequencies (UHF). This technology has made possible operation over phenomenally long ranges, opening up entirely new applications in supply chain management.

The question is: Can long- and short-range operations coexist? Certainly there are applications in which one or the other must dominate. The answer is a resounding "yes:" for the first time, as a result of the physics of RF propagation at UHF, RFID tags can be made to serve multiple masters. This paper describes a UHF Gen 2 for ILT solution and debunks several myths about its effectiveness.