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Metrology and Measurement Systems

The Journal of Committee on Metrology and Scientific Instrumentation of Polish Academy of Sciences

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Volume 21, Issue 3 (Aug 2014)

The Impedance Measurements Problem in Antennas for RFID Technique

Piotr Jankowski-Mihułowicz
  • Rzeszów University of Technology, Faculty of Electrical and Computer Engineering, Department of Electronic and Communications Systems, Pola 2, 35-959 Rzeszów, Poland (http://pjanko.sd.prz.edu.pl +48 17 854 4708)
  • Email:
/ Grzegorz Pitera
  • Rzeszów University of Technology, Faculty of Electrical and Computer Engineering, Department of Electronic and Communications Systems, Pola 2, 35-959 Rzeszów, Poland (http://pjanko.sd.prz.edu.pl +48 17 854 4708)
/ Mariusz Węglarski
  • Rzeszów University of Technology, Faculty of Electrical and Computer Engineering, Department of Electronic and Communications Systems, Pola 2, 35-959 Rzeszów, Poland (http://pjanko.sd.prz.edu.pl +48 17 854 4708)
Published Online: 2014-08-21 | DOI: https://doi.org/10.2478/mms-2014-0043

Abstract

The authors paid particular attention to the problem of antenna impedance measurements in the RFID technique. These measurements have to be realized by using two ports of a vector network analyzer and dedicated passive differential probes. Since the measurement process and estimated parameters depend on the frequency band, operating conditions, type of the system component and antenna designs used, appropriate verification of the impedance parameters on the basis of properly conducted experiments is a crucial stage in the antenna synthesis of transponders and read/write devices. Accordingly, a systematized procedure of impedance measurements is proposed. It can be easily implemented by designers preparing antennas for different kinds of RFID applications. The essence of indirect measurements of the differential impedance parameters is discussed in details. The experimental verification has been made on the basis of a few representative examples.

Keywords: RFID; antenna; impedance measurement; differential probe

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About the article

Received: 2014-01-02

Accepted: 2014-05-05

Published Online: 2014-08-21


This work was supported in part by the Polish National Centre for Research and Development (NCBR) under Grant No. PBS1/A3/3/2012. The work was developed by using the equipment purchased in the Operational Program Development of Eastern Poland 2007-2013 of the Priority Axis I Modern Economics of Activity I.3 Supporting Innovation under Grant No. POPW.01.03.00-18-012/09-00 and the Program of Development of Podkarpacie Province of The European Regional Development Fund under Grant No. UDA-RPPK.01.03.00-18-003/10-00.



Citation Information: Metrology and Measurement Systems, ISSN (Online) 2300-1941, DOI: https://doi.org/10.2478/mms-2014-0043. Export Citation

© 2014 Polish Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. (CC BY-NC-ND 3.0)

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