Systematic Theoretical Analysis of Dual-Parameters RF Readout by a Novel LC -Type Passive Sensor

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Abstract

This paper systematically studied the simultaneous measurement of two parameters by a LC-type passive sensor from the theoretical perspective. Based on the lumped circuit model of the typical LC-type passive dual-parameter sensor system, the influencing factors of the signal strength of the sensor as well as the influencing factors of signal crosstalk were both analyzed. It is found that the influencing factors of the RF readout signal strength of the sensor are mainly quality factors (Q factors) of the LC tanks, coupling coefficients, and the resonant frequency interval of the two LC tanks. And the influencing factors of the signal crosstalk are mainly coupling coefficient between the sensor inductance coils and the resonant frequency interval of the two LC tanks. The specific influence behavior of corresponding influencing factors on the signal strength and crosstalk is illustrated by a series of curves from numerical results simulated by using MATLAB software. Additionally, a decoupling scheme for solving the crosstalk problem algorithmically was proposed and a corresponding function was derived out. Overall, the theoretical analysis conducted in this work can provide design guidelines for making the dual-parameter LC-type passive sensor useful in practical applications.

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Tan, Q., Guo, Y., Wu, G., Luo, T., Wei, T., Shen, S., … Xiong, J. (2017). Systematic Theoretical Analysis of Dual-Parameters RF Readout by a Novel LC -Type Passive Sensor. Modelling and Simulation in Engineering, 2017. https://doi.org/10.1155/2017/4938732

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