Accurate and efficient analytical electrical model of antenna for NFC applications

Abstract

An accurate, compact, efficient analytical model at the electrical level of antennas dedicated to NFC (Near Field Communication) applications is presented in this paper. The model takes into account the skin effect, which is usually neglected in existing electrical models while it constitutes a major issue in the NFC context. The proposed model is validated with respect to finite element simulation. Comparison with most significant state-of-the-art models proves the proposed analytical model to be more accurate and efficient for antenna modeling in the NFC context.

Solutions for the self-adaptation of communicating systems in operation

“…Using an accurate model of the antenna [22], we can estimate the indicator by measuring the impedance at the input of the tuning block. Then the part of the system identified for the adaptation so as to ensure the targeted performances is the matching network that can be modified in order to compensate the influence of disturbances.…”

Study of adaptive tuning strategies for Near Field Communication (NFC) transmitter module

“…Based on the equivalent electrical model of Figure 8 and assuming that the values of the antenna electrical parameters are known, we can now derive the analytical expression that relates the impedance at the input of the tuning block (Z IN ) to the transformed transponder impedance (Z TT ) that models the influence of the receiver from classical complex impedance network calculations. Note that the values of the antenna electrical parameters can be obtained either from electrical measurements or from physical antenna characteristics using appropriate analytical model as developed in [10].…”