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.