TY - JOUR N2 - 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. L1 - http://www.journals.pan.pl/Content/90267/PDF/Journal10178-VolumeXXI%20Issue3_12.pdf L2 - http://www.journals.pan.pl/Content/90267 PY - 2014 IS - No 3 EP - 520 DO - 10.2478/mms-2014-0043 KW - RFID KW - antenna KW - impedance measurement KW - differential probe A1 - Jankowski-Mihułowicz, Piotr A1 - Pitera, Grzegorz A1 - Węglarski, Mariusz PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation DA - 2014 T1 - The Impedance Measurements Problem in Antennas for RFID Technique SP - 509 UR - http://www.journals.pan.pl/dlibra/publication/edition/90267 T2 - Metrology and Measurement Systems ER -