RFID Journal Staff asked 7 years ago I would like the system to have long-range tracking functionality and short-range reading capability from some readers for access control and at kiosks. What would you recommend?
—Koketso
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Koketso,
Most ticketing systems use passive HF RFID because the read range is short and you can ensure that you read only one ticket at a time. Passive HF transponders based on the ISO 14443 standard support encryption and have a read range of just a few inches. The value of these tags is that when you walk up to a kiosk, it reads only your tag (or wristband with an embedded transponder). You don't want to read the tag of the person behind you as well.
HF tags based on this air-interface protocol do not provide a long read range. You could go with passive UHF tags that support both near- and far-field reading, or you could opt for dual-frequency transponders. Lab ID and a couple of other companies offer such systems. The HF tag would be read at close range, and the UHF tag at a longer range—but keep in mind that a passive UHF tag can only be interrogated at a distance of about 30 feet or so.
—Mark Roberti, Founder and Editor, RFID Journal
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