Abstract. There is a growing claim for radar absorbing materials in both
commercial and military purposes. The dielectric and magnetic characteristics
of Z-type ferrites are the best among other radio absorbing materials at
microwave frequencies. They are examples of the absorbing materials. Ceramic ferrite
materials are very stable to mechanically manipulation. It is a reason to use
of composite materials with ferrite powders as fillers. The magnetic
permeability of mixture is less then solid ferrite. In these conditions the
magnetic phase is diluted. However, there is a possibility to improve magnetic
properties of composite. Frequency dependence of magnetic permeability and
effect of external permanent magnetic field on characteristics of composite
mixture before polymerization are discussed.
is shown that the initial permeability of texture sample is 13 % more then
raw material. A two-layer radar absorbing structure which consists of textured
and nontextured layers has both superior absorbing characteristics and wide
bandwidth of frequencies.
Key words: composite material, radar absorbing material, reflection coefficient, complex
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