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RFID Technology and Applications Slide 38

In summary, the three RFID frequencies are LF, HF, and UHF. Depending on the size of their internal antenna, LF tags read distances range from a few millimeters to over 2 meters. HF tags read up to a meter, while UHF tags have the potential to read up to 5 meters. LF and HF tags use magnetic induction to create a well defined RF field whereas UHF tags use electric field propagation and the field is less well defined. Data rates are slowest for LF and fastest for UHF. At LF frequencies, few if any systems can discriminate between multiple tags but HF and UHF systems can detect a large number of tags at the same time. LF applications include car immobilizers, livestock identification, and Point of sale (POS) opportunities. The HF markets include pharmaceutical, libraries, ski passes, and using ISO14443 compatible products, ticketing, payments and passports. UHF markets center around distribution with pallet and case tracking, garment and airline baggage tracking, highway tolls, and PCB tagging.

PTM Published on: 2012-09-06