TY - JOUR N2 - The operating principles of RFID antennas should be considered differently than it is applied in the classical theory of radio communication systems. The procedure of measuring the radiation pattern of antennas that could be applied to RFID transponders operating in the UHF band is seldom discussed correctly in the scientific literature. The problem consists in the variability of the RFID chip impedance that strongly influences measurement results. The authors propose the proper methodology for determining the radiation pattern with respect to an individual transponder as well as an electronically tagged object. The advantage of the solution consists in the possibility of using components of different measuring systems that are available in typical antenna laboratories. The proposed procedure is particularly important in terms of parameter validation - the identification efficiency and costs of an RFID system implementation can be evaluated properly only on the basis of real values of considered parameters. L1 - http://journals.pan.pl/Content/90397/PDF/10.15.15mms-2016-0018%20paper01.pdf L2 - http://journals.pan.pl/Content/90397 PY - 2016 IS - No 2 EP - 172 DO - 10.1515/mms-2016-0018 KW - RFID KW - UHF transponder KW - antenna KW - radiation pattern A1 - Jankowski-Mihułowicz, Piotr A1 - Węglarski, Mariusz PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 23 DA - 2016.06.30 T1 - A Method for Measuring the Radiation Pattern of UHF RFID Transponders SP - 163 UR - http://journals.pan.pl/dlibra/publication/edition/90397 T2 - Metrology and Measurement Systems ER -