Open AccessA Broadband Sensor for Permittivity Measurement of Solid, Crystal Grain and Powder Dielectrics in Microwave Range
Author(s) -
Mojtaba Joodaki,
Roshan Nepal,
Ali Shourvarzi
Publication year - 2024
Publication title -
ieee sensors journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.681
H-Index - 121
eISSN - 1558-1748
pISSN - 1530-437X
DOI - 10.1109/jsen.2024.3362698
Subject(s) - signal processing and analysis , communication, networking and broadcast technologies , components, circuits, devices and systems , robotics and control systems
This study presents a novel and accurate solution for measuring the real and imaginary parts of permittivity in a wide range of dielectrics. The proposed sensor, featuring a compact metal enclosure and a rectangular aperture, is a valuable tool for microwave characterization of different dielectrics. The study encompasses both theoretical and experimental approaches, combining finite element simulations to showcase the sensor’s accuracy in diverse environments and with different material forms such as solid, crystal grain, and powder. A series of experiments were conducted using four sensors with varying enclosure dimensions, allowing for comprehensive measurements of complex permittivity within the frequency range of 3 GHz to 15 GHz. The proposed sensor not only provides high accuracy but also offers a cost-effective and efficient solution for permittivity measurements. It requires only a small sample volume and eliminates the need for complex sample preparation procedures. This research demonstrates a promising alternative to conventional techniques employed for permittivity measurement, opening up new methods for investigating dielectric properties in a variety of industrial and research settings.