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http://dx.doi.org/10.5515/KJKIEES.2007.18.11.1243

A Study on the Forward- and Reverse-Link Interrogation Range of a UHF RFID System  

Jang, Byung-Jun (Department of Electronics Engineering, Kookmin University)
Park, Jun-Seok (Department of Electronics Engineering, Kookmin University)
Cho, Hong-Gu (Department of Electronics Engineering, Kookmin University)
Lim, Jae-Bong (Department of Electronics Engineering, Kookmin University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.18, no.11, 2007 , pp. 1243-1253 More about this Journal
Abstract
Recently UHF RFID system has drawn a great deal of attention because of its potential to revolutionize supply chain management. An important characterization of the performance of a RFID system is 'interrogation range', which is defined as the maximum distance between a reader and a tag. Forward-link interrogation range is defined as the maximum distance from which the tag receives just enough power to turn on and back-scatter, and reverse-tink interrogation range is the maximum distance from which the reader can detect this back-scattered signal. A link balance has to be found between the two interrogation ranges. In this paper, the interrogation range equations are formulated in both forward-link and reverse-link and a trade-off between the two values is investigated in order to maximize the interrogation range. As a result, it is observed that the gain of the reader antenna, the isolation of the circulator, and the phase noise of the local oscillator with range correlation effect mainly determine the reverse-link interrogation range.
Keywords
UHF RFID; Gen. 2 Specification; Interrogation Range; Reader; Tag; Forward-Link; Reverse-Link;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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