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Measurement of tag antenna by a time domain reflectmetry

✍ Scribed by The Nan Chang; Wein Shie

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
565 KB
Volume
53
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

In this article, an RFID tag antenna etched on a grounded substrate is designed and tested. It takes two differentially connected photonic band gap elements. For each differential port, tag's reflection coefficient in frequency domain is transformed from two measured time domain waveforms. The first one as the input waveform is referred to an open‐circuited transmission line, whereas the second one as the response waveform is obtained by connecting one half of the tag at the end of each associated transmission line. As the TDR can provide differential signal, measurement of the tag's impedance becomes easy. Waveform in time domain is truncated according to Nicolson's ramping algorithm. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:90–93, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25649

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