Measurement of the Complex Permittivity of Low-Loss Planar Microwave Substrates Using Aperture-Coupled Microstrip Resonators

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Abstract

This paper describes a technique for the determination of the complex permittivity of low-loss dielectric substrates at microwave frequencies. The technique utilizes an aperture-coupled microstrip resonator fed using a microstrip line in a two layer configuration. The ends of the resonator are shorted in order to avoid radiation. The technique can also be used for the measurement of the complex permittivity of other electronic materials such as thin and thick film materials at microwave frequencies. Nonresonant modes and conductor losses are taken into account in the analysis to improve the accuracy of the results. Analysis procedure as well as experimental results are presented.

Original languageEnglish
Pages (from-to)1343-1348
Number of pages6
JournalIEEE Transactions on Microwave Theory and Techniques
Volume41
Issue number8
DOIs
StatePublished - Aug 1993

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