An SIW Resonator Sensor for Liquid Permittivity Measurements at C Band

This letter presents a novel substrate integrated waveguide (SIW) resonator sensor that is specifically designed to measure the complex permittivity of liquids. The resonant characteristics of the sensor are influenced by liquids through a slot opened on the top plane. The inverse problem of obtaini...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 25; no. 11; pp. 751 - 753
Main Authors Changjun Liu, Fan Tong
Format Journal Article
LanguageEnglish
Published IEEE 01.11.2015
Subjects
Artificial neural network (ANN)
Artificial neural networks
complex permittivity
Liquids
microwave industrial application
Permittivity measurement
Q-factor
Resonant frequency
resonator
substrate integrated waveguide (SIW)
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Summary:This letter presents a novel substrate integrated waveguide (SIW) resonator sensor that is specifically designed to measure the complex permittivity of liquids. The resonant characteristics of the sensor are influenced by liquids through a slot opened on the top plane. The inverse problem of obtaining permittivity is solved with artificial neural network. Experiments were performed with an SIW resonator sensor designed at C band. Experimental data were reported and they agreed well to the reference values. The sensor is simple and low cost, which may be applied to permittivity measurements in applications at the industrial, scientific and medical (ISM) frequencies.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2015.2479851