一种确定13.56MHz射频识别系统互感的新方法

2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing Pub Date : 2008-07-25 DOI:10.1109/CSNDSP.2008.4610726

S. Hackl, C. Lanschutzer, P. Raggam, W. Randeu

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引用次数: 12

摘要

本文提出了一种确定13.56 MHz射频识别系统的磁耦合系数k和互感系数m的新方法。该方法基于双端口的考虑来获得耦合系统的阻抗矩阵的元素。利用物理电感模型，由阻抗矩阵和线圈等效电路值计算互感。此外，本文提出的系统模型还考虑了两个线圈之间的电容耦合。叙述了现有的方法及其缺点，详细说明了新方法及其改进。最后，将该方法和新方法的测量结果与电磁仿真结果进行了比较。

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A novel method for determining the mutual inductance for 13.56MHz RFID systems

A main parameter of a 13.56 MHz RFID system is the magnetic coupling factor k respectively the mutual inductance M. In this paper a new method for determining the mutual inductance is presented. This method is based on a two-port consideration to obtain the elements of the impedance matrix of the coupling system. The mutual inductance is calculated from the impedance matrix and the coilpsilas equivalent circuit values using a physical inductor model. Furthermore the system model presented in this paper includes the capacitive coupling between the two coils. Present methods and their disadvantages are described and the new method and its improvements are explained in detail. Finally, measurement results of a present method and of the new method are compared to EM simulation results.

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2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing

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