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Published in:
Planar Microwave Sensors Read chapter Read first chapter

2024 | OriginalPaper | Chapter

Permittivity Sensors Based on Coupled Line Sections

Authors : Ilona Piekarz, Jakub Sorocki

Published in: Coupled Structures for Microwave Sensing

Publisher: Springer Nature Switzerland

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Abstract

This chapter focuses on coupled-line section sensors operating under differential excitation utilized for wideband characterization of dielectric materials. Various realizations of sensors designed for the determination of complex permittivity of solid, as well as liquid materials, are presented together with the theoretical analysis, calibration methods, and measurement results. It is shown that utilization of differential excitation in coupled-line-based sensors allows to increase the sensitivity to small-sized materials under test (i.e., having a size comparable with the distance between the sensors’ strips). Thus, these sensors can be utilized for the characterization of small amounts of liquids placed in a microfluidic channel. A comparison between the coupled-line-based sensors and other sensors described in the literature, allowing for the characterization of dielectric materials in a wide frequency range, is also provided.

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previous chapter Coupled Planar Microwave Resonators and Transmission-Line Structures
next chapter Coupled-Line Directional Coupler Permittivity Sensors
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Metadata
Title
Permittivity Sensors Based on Coupled Line Sections
Authors
Ilona Piekarz
Jakub Sorocki
Copyright Year
2024
Book
Coupled Structures for Microwave Sensing

Print ISBN: 978-3-031-53860-5

Electronic ISBN: 978-3-031-53861-2

Copyright Year: 2024

DOI
https://doi.org/10.1007/978-3-031-53861-2_3