An effective solution to the problem of the ferrite tile gap effect

Due to the high permeability of ferrite, the presence of air gaps between adjacent tiles diminishes the performance of both the absorber and the anechoic chamber dramatically. The effectiveness of using gap fillers based on ferrite powder (e.g. ferrite rubber) is constrained due to the poor properties of ferrite powder. The problem can be solved effectively only with the use of higher permeability magnetic materials. A family of new magnetic materials has been developed by the authors. Among them is a material which can be plastic and can serve well as a gap filler. The permeability of the material is far higher than that of any mixture containing ferrite powder, even at high concentrations. In this paper, we show the effectiveness of high permeability material for filling these gaps. Due to the high permeability of the new filler the reflectivity of a resultant layer made of tiles with gaps is practically identical to that of a solid sheet of ferrite