What is the smallest commercially available UHF RFID tag with a read range of 1 meter (3.3 feet)?
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A tag's read range is dependent on a variety of factors. The design of the tag antenna is important, of course, but the output of the reader and the type of reader antenna will also affect range, so it would not be possible to say for certain that a tag could be read at a distance of 1 meter in every situation. That being said, I would check out Avery Dennison's AD-850m4QT, which has a diameter of 10 millimeters (0.4 inch) and is designed to be read from 1 meter away. Also check out SML's GB11eU7 inlay, which measures 14 millimeters by 14 millimeters (0.55 inch by 0.55 inch).
There may be other transponders that could meet your needs as well. I would suggest you purchase the European EPC Competence Center (EECC)'s 2020 "UHF Tag Performance Study" (see EECC Study Finds Growth in UHF Tag Volume, Variety). That report looks at the performance of a wide variety of passive UHF tags currently on the market.
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