Dielectric Measurement of Substrate Materials Using 3D Printed Re-Entrant Cavity Resonator

Ali Musa Mohammed, Yi Wang, Milan Salek

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Modified re-entrant cavity has been designed and fabricated using 3D printing for dielectric characterisation of substrate materials at 2 GHz. The cavity has the capability of measuring the dielectric constant of solid sample of various thickness. A mathematical model based on simulation has been developed and utilised for the extraction of the dielectric property. Several samples of substrates of 20 mm in diameter have been measured using the designed cavity resonator. The results obtained have good agreement with values reported in literature. An uncertainty analysis of measurements is also provided. The method is promising for measurement of low dielectric and low loss material for industrial application.
Original languageEnglish
Title of host publication2021 51st European Microwave Conference (EuMC)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages4
ISBN (Electronic)9782874870637
ISBN (Print)9781665447218 (PoD)
Publication statusPublished - 2 Jun 2022
Event51st European Microwave Conference, EuMC 2021 - London, United Kingdom
Duration: 4 Apr 20226 Apr 2022

Publication series

NameEuropean Microwave Conference
ISSN (Print)2325-0305


Conference51st European Microwave Conference, EuMC 2021
Country/TerritoryUnited Kingdom


  • Dielectric constant
  • re-entrant cavity
  • substrate
  • 3D printing


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