چكيده به لاتين
Today, the focus on providing nanotechnology coatings with the lowest weight and the highest absorption coefficient of electromagnetic waves has kept researchers active in the field of reducing the radar cross section. In this research, the analysis and investigation of radar absorber materials containing the dielectric of synthesized multi-walled carbon nanotubes, nanosilica and nanoiron oxide in an epoxy resin matrix bed with variable mass percentages that improve the performance of wave absorption and radar power loss in a wide range of X-band frequencies (8) up to 12 GHz) and under different environmental conditions, in this research, the meaning and concept of radar evasion and its application in the aviation industry are discussed, then the governing equations for the structural deformation and absorption and passage of absorbent material in this behavior are analyzed and It is analyzed and finally, after the design of the test modes, the test proceeds in the form of a laboratory test set-up according to the test standards of the Electrical and Field Laboratory, and the nanocomposite is made in the laboratory samples, and after performing the mechanical and thermal stability tests, the most suitable sample in terms of the highest percentage Absorption and the maximum loss of the wave signal, which is equivalent to -7 dB in the 12.4 GHz band, are selected. In the next step, the formulation of the superior sample in the form of nanocomposite samples is subjected to several tests, such as the growth electron microscope and the Pertwix diffraction test. At the end, the results extracted from the amount of radar absorption, deflection, and transmission are compared with similar research and the final results are presented. In addition, the effects of different structural geometries such as a simple plate and plates with one or more curvatures in order to reduce the surface The radar cross-section in the form of uniform surfaces of nanocomposite material is checked in Comsol software and the dispersion parameters and impedance matching diagrams are analyzed and investigated, the result of which is the greatest reduction of reflection in the 10 GHz range, which is equivalent to -12 dB for a monocro aluminum plate. It is recorded
