Conductivity Comparison of Smooth Metals (10 - 110 GHz)

Measurement Results

• Each metal was measured using split-cylinder resonators (10, 20, 28, and 40 GHz) and a Fabry-Perot resonator (broadband).
• DC conductivity values are based on literature values.

Key Point!

• For smooth metals, conductivity in the high-frequency range remains consistent with DC conductivity.
• Even when switching between instruments, the measured values show no step discontinuity, enabling continuous data acquisition from 10 to 110 GHz.

EM labs conductivity measurement systems can also measure metals other than copper. Four types of smooth metal were measured. The results show that, when the surface is not roughened, conductivity remains consistent with the DC value even in the high-frequency range. When the surface is roughened, conductivity decreases as frequency increases; these results also indicate that surface roughness is the main factor.