Microwave Dielectric Measurement of Solids and Liquids over 1 to 4 Ghz Using Transmission Line Technique and Coaxial Cavity
نویسندگان
چکیده
Accurate microwave dielectric measurement of materials is necessary data for the design engineer during the development stage of electronic and communication components. Several techniques have been published in recent years for measurement of dielectric properties of materials at microwave frequencies. Each of these techniques has some limitations in terms of accuracy and frequency coverage. This paper presents a novel method based on coaxial transmission line for the measurements of dielectric properties of a wide range of materials in the frequency range of 1 GHz to 4 GHz. A combined analytical-numerical method for conversion of smoothed transmission scattering ( 21 S ) parameters to complex permittivity is also presented. The measurement method was validated using air, low-loss solid and a high-loss liquid. The technique was then used to investigate the microwave absorption of an iron complexed and ligated to polyarylonitrile yarn powder.
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