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http://dx.doi.org/10.5515/KJKIEES.2013.24.12.1148

Impedance Evaluation Method of UHF RFID Tag Chip for Maximum Read Range  

Sim, Yong-Seog (Graduate School of Information & Communication, Daegu University)
Yang, Jeen-Mo (School of Electronic & Electrical Engineering, Daegu University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.24, no.12, 2013 , pp. 1148-1157 More about this Journal
Abstract
In a passive UHF RFID system, the impedance matching between tag antenna and chip as well as the protocol parameter settings in a reader plays important role in determination of the maximum read-range. Almost no paper, however, has dealt with the above issues in relation with the maximum read range. In this paper, two known methods (of using the value from data sheets and proprietary RFID tester) and our proposing method in chip impedance evaluation are compared in terms of maximum read range. The read range of tags whose antenna impedance is conjugate matched with the chip impedance obtained from the proposed method is improved maximum 73 % more than that of tags from the other methods.
Keywords
RFID; RFID Tag; Read Range; Chip Impedance;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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