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Radar-absorbing properties of matrix polymer composite nanomaterials at microwave frequencies

Keywords:

N.M. Ushakov – Dr. Sc. (Phys.-Math.), Head of Laboratory of Submicron Electronics, Saratov branch of Kotel\'nikov IRE of RAS, Professor, Department «Radio Engineering», Yuri Gagarin State Technical University of Saratov E-mail: nmu@bk.ru S.Yu. Molchanov – Post-graduate Student, Department «Radio Engineering», Yuri Gagarin State Technical University of Saratov E-mail: canishe@yandex.ru


The paper presents the results of numerical experiment aimed to investigation both of dielectric properties of polymer composite nanomaterials, and the electromagnetic wave attenuation in these materials over the frequency range from 1 GHz to 300 GHz. Calculations of dielectric loss are performed basing on the Maxwell−Garnet-, Maxwell−Wagner-, and Cole−Cole-models. As a matrix, there was considered polymers that were dielectrics such as polyethylene of high pressure and polymethylmethacrylate. As the materials for nanoparticles, a silver (σ = 6•10−8 Sm/m) and semiconductor compounds such as lead sulfide (PbS, σ = 2•10−3 Sm/m) and indium antimonide (InSb, σ = 6•10−5 Sm/m) were chosen. A concentration of nanoparticles in the matrix was corresponding to 1016…1017 sm−3 that was agreed with an average statistical value. Dimensions of nanoparticles did not exceed 30 nµm. Frequency dependencies of radio absorption of electromagnetic radiation in composite nanomaterials with different electro-conductivities of nanoparticles are given. A comparison of suggested composite nanomaterials with the known ones was carried out according to the absorption level over the frequency range from 2 to 40 GHz. It is shown, the absorber on the composite nanomaterial silver-polymethylmethacrylate provides a minimum level of absorption of electromagnetic radiation power equal to 20 dB at the thickness of 50 µm.
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