RFID Journal Staff asked 8 years ago I'm a student doing research on RFID antennas, and I'm looking for an RFID chip that can operate at 2.45 GHz. Can you help?
—Name withheld
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The only passive RFID transponder that operates at 2.45 GHz is Hitachi's µ-Chip (pronounced "mu-chip"), which has a built-in antenna on the chip and a very short read range of only a few millimeters (see Hitachi Unveils Smallest RFID Chip, Hitachi Unveils Integrated RFID Tag and Where Can I Find a Tiny RFID Transponder?). It is designed to be embedded in currency or labels for identification, tracking and anti-counterfeiting purposes. There are a number of active RFID systems that operate at 2.45 GHz, but you cannot buy just the chips—you must purchase the complete tags.
—Mark Roberti, Founder and Editor, RFID Journal
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