RFID - A Tale of Four Continents

RFID frequencies
Finally, let us look at frequencies. Early RFID was mainly at LF because such tags were easily hand made in modest numbers and they were very tolerant of metal and water. With mass applications some way away, tag cost and size were not primary considerations. Then came HF tags which are an excellent compromise for the higher volume applications, including cards, the favorite format by overall money spent. However, in the last two years the proponents of UHF tags have made the greatest noise and they have got specifications for air baggage, pallets, and cases rewritten to focus exclusively on their capability—truly a triumph of marketing.