The four primary frequency bands for RFID tags are
Low Frequency or LF (120–140 KHz)
High Frequency or HF (13.56 MHz)
Ultra High Frequency or UHF (860–960 MHz)
Super High Frequency/Microwave (2.45 GHz and above)
The following list highlights each of these tag frequencies in more depth:
Low Frequency (LF) Tags —These tags operate at 120–140 KHz. They are generally passive and use near field inductive coupling; therefore, they are well suited for applications requiring reading small amounts of data at relatively slow speeds and at short distances. Their read range varies from 1′ to 36′ (1 meter), typically below 18′ (0.5 meter). LF tags do not support simultaneous tag reads; therefore, there are no collision issues. LF tags are also ...