Preparation and Study Absorption Coatings from Two layers Ferrite (MnFe2O4) and Different Metal Oxides within Electromagnetic Frequency Bandwidth (8-12.5)GHz

Two layeres coatings were prepared one of them is from different metal oxides (TiO2, Fe2O3, ZnO, MgO, CuO, CdO, Ni2O3, MnO2) and the other is from ferrite powder (MnFe2O4) for each sample. Absorption measurements for electromagnetic (EM) waves in the frequency range (8-12.5)GHz were achieved by the standing wave ratio SWR instrument. In addition a study of the effect in exchanging the oxide layer with the ferrite powder layer when they are radiated by (EM) waves. It was noticed that the oxide layer (MnO2) and the oxide layer (Ni2O3) were the best among other prepared samples as they posses nearly equal absorption values with the ferrite layer when they are subjected to the (EM) waves directly and in exchange with the ferrite layer. The (MnO2) oxide with the ferrite showed an absorption value of (87%) at the frequency range (10.2-11.4)GHz, while the (Ni2O3) oxide with the ferrite showed an absorption value of (80.5%) at the frequency range (10.8-12.4)GHz in comparison with other prepared samples.