The following is excerpted from Chapter 3: Radio Basics for UHF RFID from the Book, The RF in RFID: Passive UHF RFID in Practice by Daniel M. Dobkin. Order a copy of The RF in RFID: Passive UHF RFID ...

A periodic signal that persists indefinitely, without changing its amplitude, frequency, or Phase–a continuous wave (CW) signal–carries no information other than the fact that it is present. In order ...