UHF RFID Antennas for Printer-Encoders - Part 1: System Requirements
High Frequency Electronics, Zebra Technologies Corporation
Boris Y. Tsirline
This series of arti-cles reviews UHF transmission line antennas developed for RFID Printer-Encoders. It explains the basic oper-ating principles of anten-nas, their effect on the printer’s encoding function as well as how the antennas influence the design of labels with embedded transponders (Smart Labels). The survey of antennas is preceded by the evalua-tion of antenna-transponder mutual coupling in reactive near-field and by the analysis of the Printer-Encoder environment, which yields four comparison criteria of the anten-nas’ performance.
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