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Waveguide Dielectric Permittivity Measurement Technique Based on Resonant FSS Filters

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4 Author(s)
Costa, F. ; Dept. of Inf. Eng., Univ. of Pisa, Pisa, Italy ; Amabile, C. ; Monorchio, A. ; Prati, Enrico

A method to determine the dielectric permittivity of materials is presented. Such a method exploits the use of a low-cost frequency selective structure (FSS), transversally placed in a waveguide in the proximity of the sample under test. The presence of the additional dielectric placed close to the FSS leads to a shift of bandpass and bandstop resonance frequencies. The relationship between the frequency shift and the permittivity of the dielectric under test allows the determination of the unknown permittivity. Such a procedure is particularly suitable for measuring the dielectric permittivity of thin slabs.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:21 ,  Issue: 5 )

Date of Publication:

May 2011

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