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Dvortsov A. V., "Resonance Method of Measuring a Stuff Dielectric Properties at Microwave Frequencies"

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Mikhail Vink

This document summarizes a student's presentation on using a resonance method to measure the dielectric properties of materials at microwave frequencies. The student investigated calculating the dielectric constant, quality factor, and loss tangent of samples. Tests were conducted using a vector network analyzer and coaxial resonator on epoxy compound samples. Measurement errors were calculated and the dielectric constant of epoxy was found to depend on frequency. The method allows evaluation of degradation in integrated circuit packages and dielectric materials. In conclusion, the resonance method was shown to be accurate, reliable, and informative for these measurements.

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1886Saint Petersburg?Electrotechnical University?"LETI "TEP Conference presentationTheme: ?Resonance Method of Measuring a Stuff DielectricProperties at Microwave Frequencies?Student: Dvortsov A. V.Managers: Medvedeva N. Y.Mikerov A. G.
The purpose of the work: Investigation of?the resonance?method of measuring?the dielectric properties?of materials?at microwave?frequencies,?which includes:methodology for calculating?the dielectric constant,?quality factor?and loss tangent?of the samples?of materialscalculation?error of methodusing this?method?to study the?degradation?phenomena?in?packages of integrated circuits and?dielectric?materials.Dvortsov A. V., 62022
Test?benchMeasured?parameters:-resonant frequency,-transfer coefficient(S21-parameter)Vector?Network Analyzer Rohde&Schwarz ZVA-40Characteristics?of the vector?network analyzer Rohde&SchwarzZVA-40:Operating?frequency range:10 MHz-40 GHzThe sensitivity of?the frequency -0,5 HzSensitivity?of the transfer -0,01 dB-no sample- patternS21, dB0-50-100-150-2001231.52.5GHzCoaxial?ResonatorDvortsov A. V., 62023
Microwave?inputLbaMicrowave?inputSampleMobile?terminalMovable?sample holderDesign scheme?of the resonatorL = 100 mma = 10 mmb = 20 mmThe equivalent circuit of?the resonator: impedance of?the capacitor at?a frequency - input?resistance of?short-line- impedance of?the coaxial?lineResonance condition:- wave numberDvortsov A. V., 62024
Calculation formulasCapacity?of the measured?sampleCapacity of?a flat capacitorPermittivityQ-factor of?empty?resonator?and?resonator?with the?sample :Q-factor?of the sample :Loss tangent Dvortsov A. V., 62025
Treatment?of experimental resultsSample under investigationMeasurement error?was?calculated :- for?the resonant frequency- for the?capacity- for?permittivityThe dependence of?the dielectric?constant?of the sample?frequencyThe calculation results of Dvortsov A. V., 62026
Results of?the researchbaselinebaseline?after?exposure?to?moistureagedaged?after?exposure?to?moistureaged0123456f, baselinebaseline884fresh _drybaseline?after?exposure?to?moisturefresh _ moistened7EMC_dry7aged _dryEMC _ moistened366aged _ moistened C, pF552443310123456012345012345f, GHzf, GHzf, Corps?of Integrated CircuitsEpoxy?Compound7Dvortsov A. V., 6202
ConclusionA method for?measuring?permittivity?materials?at microwave frequencies?(UHF),?based?on the?dependence of?the resonance frequency of?bulk?coaxial?microwave?cavity?of?the electrical parameters?embedded?in?the cavity?of the samples?of the materials.
Calculated?measurement error.

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Dvortsov A. V., "Resonance Method of Measuring a Stuff Dielectric Properties at Microwave Frequencies"