Peter Raggam

A novel method for determining the resonance frequency of PICCs

The resonance frequency is a very important parameter for the characterization of PICCs. In this paper a new method for measuring the resonance frequency is presented. In spite of the widely used Real{Z} method the new transfer function method assures a well defined constant working state of the PICC during the measurement. Additionally only scalar measurements have to be performed. First the problems of the Real{Z} method are analyzed and then theory and advantages of the new method are presented by analytical calculations and simulations. Then a practical realization of the transfer function method is presented and the quality of the method is proved by measuring the resonance frequencies of passive reference devices and standard PICCs.

Investigation and error analysis of a measurement method for determining the resonance frequency of PICCs

SummaryThe resonance frequency is an important parameter to characterize a Proximity Integrated Circuit Card (PICC). In this paper the resonance frequency of a PICC is defined and derived by using circuit analysis. Then a resonance frequency measurement method is investigated and a detailed error analysis is performed by simulation and measurements.ZusammenfassungDie Resonanzfrequenz ist ein wichtiger Parameter für die Charakterisierung eines Transponders. In diesem Artikel findet zuerst eine Definition der Resonanzfrequenz eines Transponders statt. Mittels eines Ersatzschaltbildes kann diese Resonanzfrequenz analytisch bestimmt werden. Anschließend wird eine Messmethode für die Ermittlung der Resonanzfrequenz unter Berücksichtigung verschiedener Einflussgrößen untersucht.