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If I Have a UHF RFID Reader, Do I Need UHF Tags, Too?
Can I develop a solution using UHF readers but with HF tags? Would that work?
You need to use passive ultrahigh-frequency (UHF) tags with a passive UHF reader. Radio antennas must be tuned to the same frequency. Just as you can't listen to an AM radio station with an FM-only radio, you can't read a passive high-frequency (HF) tag via a passive UHF reader. In addition, the tag and reader must employ the same air-interface protocol standard (usually ISO 18000-6C for passive UHF). The air-interface protocol is the "language" that tags and readers use to communicate. If a tag and a reader don't utilize the same protocol, then the tag will receive signals from the reader antenna, but will not know what those signals mean nor be able to respond appropriately.
—Mark Roberti, Founder and Editor, RFID Journal
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