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In this paper, we demonstrate that a long thin metal structure can act as as a near-field antenna for a passive UHF RFID system comprising a metal mounted tag on the structure and a direct electrical feed onto the structure for both transmission of reader to tag signals and reception of the tag response. It is shown that a conventional metal mounted tag can be read up to 30 m away from the feed point...
This paper demonstrates that a long thin metal structure can act as a near-field antenna for a passive UHF RFID system. It is demonstrated that a conventional metal mountable tag can be detected up to 30 m along a metal bar from the feed point far exceeding the maximum far field free space range of the tag when mounted on metal. Further system improvements are achieved by altering the physical length...
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