Mojix has developed an ultrahigh-frequency (UHF) system that the company says can be designed to create a defined area. The firm employs devices that emit energy to power up the tags, and a separate receiver to receive the tags’ signals. Mojix has a version of the system that can be used outdoors, but I am not sure whether it is designed to withstand the rigors of being deployed on a pig farm. A simpler option might be to create a portal at a gate, then read the tags on the pigs as they pass through the gate.
—Mark Roberti, Editor, RFID Journal
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