Measurement of Complex Permittivity of Insulating Substrates with an Open-Ended Coaxial Resonator

Abstract:

A novel cavity perturbation technique utilizing open-ended coaxial resonator is presented in order to measure the complex permittivity of insulating substrates at microwave frequencies. This technique can afford quite high accurate measurement results without singularities, and simply. According to the operation frequency of the resonator, the geometric parameters of the resonator are designed. Based on the perturbation technique, a new formulaic method of data analysis has been proposed which can extract complex permittivity of samples, and with the resonant frequency and the quality factor shift, one can calculate the complex permittivity of the measured materials. Experiment has been conducted with the quartz and sapphire to verify the formulaic, and the test results fully verify the correctness of the proposed method.

• Periodical: Advanced Materials Research (Volume 1052)
• Pages: 427-432
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1052.427
• Online since: October 2014
• Authors: Kun Peng Tian*, Gao Feng Guo, Jun Hu Wang, En Li
• Keywords: Complex Linear Regression, Complex Permittivity Test, Open-Ended Coaxial Resonator, Perturbation Technique

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