Abstract
The thermal characteristics of the thin-film resistance thermometer for measurement of electromagnetic energy fluxes have been investigated. It has been found that when γh/(α1t)½≪1, the temperature-time history of the thin film is mathematically the same as that of the surface of a semi-infinite slab heated by a constant energy flux. The antenna properties of the thin-film gauge have been analyzed using a simple antenna model and equivalent circuit. The relation between the Poynting flux and the ``apparent'' constant energy flux has been investigated experimentally for two cases, and it has been found that the analysis predicts values of energy fluxes that are about 40% below the measured values.
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