A novel method for impedance measurement of balanced UHF RFID tag antennas

Bo Wang, Yiqi Zhuang, Xiaoming Li, Xiaojiao Ren, Zengwei Qi and Yanlong Zhang

Journal of Electromagnetic Waves and Applications, 2014, vol. 28, issue 16, 2059-2066

Abstract: This paper proposes a novel method for the impedance measurement of balanced UHF RFID tag antennas. The traditional method used a wire balun-connected probe to measure balanced antennas. But this technique has a system error that results from the wire balun effects. This paper presents a novel method to de-embed the wire balun effects and improve the accuracy of measurement based on algorithm. Comparing with other de-embed methods, the novel method does not need the inner structure of fixture or rely on the accuracy of modelling the measurement fixture.

Date: 2014
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DOI: 10.1080/09205071.2014.957350

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