磁性・誘電性複合体の電波吸収特性

概要

論文の詳細を見る
In recent years, because of the rapid progress in wireless technology, microwave absorbers or noise suppressors have become necessary for a safe-electromagnetic-wave-level environment. To design microwave absorbers or noise suppressors, it is necessary to have knowledge of complex permittivity, εr* and permeability, μr*. In this report, we show the values of complex permeability, μr* and permittivity, εr* for a composite materials of magnetic (Iron, Fe, coated by Fe3O4) and dielectric (Titanium Oxide, TiO2), by changing Fe / TiO2 volume fraction ratio. As changing of these, we can change the values of complex permeability (μr* = μr - jμr") and complex permittivity (εr* = εr - jεr"). And the results are applied in the design of a microwave absorber which makes reflection losses and the central frequency to do a purpose, for example, necessary conditions of ETC (5.8GHz) use in Japan.
社団法人電気学会の論文
2008-06-01