Editing Low frequency (section)

===Other applications===
Some radio frequency identification ([[RFID]]) tags utilize LF. These tags are commonly known as LFIDs or LowFIDs (low frequency identification). The LF RFID tags are [[near field and far field|near-field]] devices, interacting with the [[resonant inductive coupling|inductive near field]], rather than with radiated waves (radio waves) that are the only part of the electromagnetic field that persists into the far field. As such, they are technically ''not'' radio devices nor radio antennas, even though they do operate at radio frequencies, and are ''called'' "antennas" in the RFID trade, but not in [[radio engineering]]. It is more proper, and technically more informative to think of them as secondary coils of very loosely coupled [[transformer]]s.