Microwave Planar Sensor for Permittivity Determination of Dielectric Materials

Unique Permittivity Determination of Low- Loss Dielectric Materials from Transmis- Sion Measurements at Microwave Frequen- Cies

A non-resonant microwave method has been proposed for accurate complex permittivity determination of low-loss materials. The method uses two measurement data of the magnitude of transmission properties of the sample. While the first datum must correspond to a frequency point resulting in a maximum magnitude of transmission properties, the other can be any datum at a frequency different than the...

Planar Microwave Sensors for Complex Permittivity Characterization of Materials and Their Applications

Dielectric Permittivity Modulation of Liquid Crystals for Microwave Applications

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Microstrip patch sensor for measurement of the permittivity of homogeneous dielectric materials

An application of a small air-spaced coaxially fed rectangular microstrip patch antenna as a sensor for permittivity measurement is presented. The models used for the calculation of the permittivity from the shift in the resonant frequency for solid and liquid materials are described. The models are experimentally verified by measurements for several liquid and solid samples. The results are co...

Determination of the Complex Permittivity Values of Planar Dielectric Substrates Bymeans of Amultifrequency Pso-based Technique

In this paper, an innovative technique for the determination of the dielectric properties of planar substrates is presented. Starting from a set of impedance measurements performed on a section of a microstrip transmission line built on the planar dielectric substrate under test, the proposed technique formulates the reconstruction problem in terms of an optimization one successively solved by ...