Measurement Method for Surface Conductivity of Copper Foil With Dielectric Using Fabry–Perot Resonator in Millimeter-Wave Band
Abstract
We propose a method for measuring the effective conductivity of copper foil using a Fabry–Perot resonator, particularly for cases in which the foil cannot be separated from the dielectric layer or when measurements must be performed with the dielectric film in place to evaluate its sealing effects. In particular, using a Gaussian beam wave formulation, the resonance frequency and$Q$factor are measured for both a copper foil with a rough surface and a copper foil with dielectric, and the measured effective conductivities for both are shown to agree well. This indicates that the effect of the newly added dielectric loss can be successfully removed compared to the measurement of the copper foil without dielectric.
Fields of Study & Subjects
Microwave and Dielectric Measurement Techniques
Nanomaterials and Printing Technologies
Advanced Antenna and Metasurface Technologies
Publication details
- Journal / source
- IEEE Transactions on Microwave Theory and Techniques
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Volume
- 74
- Issue
- 4
- Pages
- 3689–3697
- Publication date
- 15 January 2026
- Language
- EN