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RF Joule Losses Analysis in Thin Film Noise Suppressor Estimated by 3-D Equivalent Circuit Network

This paper discusses the Joule losses in a thin film noise suppressor based on 3-D equivalent circuit network analysis and 3-D full wave electromagnetic field simulation. The thin film and transmission line is divided into number of elements in a plane perpendicular to surface of thin film. Each element is represented by four resistances in length and width direction and capacitors between conductors. Joule loss is quantitatively calculated as a function of sheet resistance using equivalent circuit network analysis. From this result it is successful by shown the Joule loss in thin film is a function of sheet resistance, not the intrinsic resistivity of the thin film or thickness as previous analyses. It is also shown that the Joule loss in the thin film is determined by the two major factors; the eddy current and conduction current deviated from the signal line in the form of displacement current. This result shows that the proposed equivalent circuits well explain the mechanism of the Joule losses in thin film.