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UHF and HF Tags

Analysis of Commodity Tags and Readers Supreetha Rao Aroor, Mutharasu Sivakumar, Naaser Ahmed Mohammed, Daniel D. Deavours. Introduction. UHF Far-Field Tags Near Metal. Honeywell wanted to explore different commodity tags for metal tagging Tested UHF far-field tags

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UHF and HF Tags

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  1. Analysis of Commodity Tags and Readers Supreetha Rao Aroor, Mutharasu Sivakumar, Naaser Ahmed Mohammed, Daniel D. Deavours Introduction UHF Far-Field Tags Near Metal • Honeywell wanted to explore different commodity tags for metal tagging • Tested UHF far-field tags • Tested 18 commodity tags • With 8 separations from metal • With 5 readers • Tested 5 UHF near-field tags • Tested 2 HF tags with 5 readers Radiation pattern for ALL-9440 with 3/16 foam separation from metal Radiation pattern for ALL-9440 in free space • Large degradation in performance when placed near metal • E.g., ALL-9440 has a 56% reduction in maximum read distance UHF and HF Tags Comparison of Readers • HF tags on metal have near-touch read distances • UHF near-field tags are generally worse than HF

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