Contactless Characterization of Metals’ Thermal Expansion Coefficient by a Free-Space RF Measurement

In this communication, a novel method to characterize the thermal dilatation of metals using contactless measurement frequency-dependent reflection coefficient resonator is introduced. This wireless technique allows extracting expansion material without need any calibration. Two antennas, VNA, and scatterer fabricated with under-test are required. All measurements have been achieved climatic chamber absorbers control scatterer's temperature. The measured values for coefficients in good agreement provided by manufacturer which confirmed sensibility study.