RFID tags are designed and produced in a variety of shapes and sizes, dependent on application requirements. As UHF RFID has a large maximum read range to begin with, using extremely small tags for such applications as near field item level tracking (where tags may reside under bottles caps or behind product labels, for example) is promising. Applications such as pallet or case level tracking of commodities on conveyors or passing through portals, and read from a distance, typically require larger tags.
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