Inductive coupling-based wireless sensors for high-frequency measurements

H. S. Kim, S. Sivaramakrishnan, A. S. Sezen, Rajesh Rajamani

Research output: Chapter in Book/Report/Conference proceedingChapter


This chapter presents a novel real-time method called “cascaded filtering” that enables wireless estimation of high-frequency changes in capacitance by algebraically manipulating two measurements (the magnitude and the phase of the reflected sensor impedance). Compared to previous estimation techniques, the proposed capacitance estimation algorithm has been developed to obtain the following advantages. First, the proposed algorithm makes it possible to continuously estimate the rapidly varying capacitance of a capacitive sensor as well as static or slowly varying ones. Second, it is quite simple and inexpensive to practically implement the proposed algorithm since it is derived without the need for frequency sweeping operation on the primary circuit.

Original languageEnglish (US)
Title of host publicationSmart Sensors for Industrial Applications
PublisherCRC Press
Number of pages17
ISBN (Electronic)9781466568112
ISBN (Print)9781466568105
StatePublished - Jan 1 2017

Bibliographical note

Publisher Copyright:
© 2013 by Taylor & Francis Group, LLC.


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