کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7995905 1516206 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Design of a broadband electromagnetic absorbers based on TiO2/Al2O3 ceramic coatings with metamaterial surfaces
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Design of a broadband electromagnetic absorbers based on TiO2/Al2O3 ceramic coatings with metamaterial surfaces
چکیده انگلیسی
This paper presents a design method of wide-band radar absorber (RA) based on TiO2/Al2O3 ceramic coatings with metamaterial surfaces. The metamaterial surfaces are made up of periodic array of metallic patches consisting of circular and square aluminum film. The effects of design parameters on the reflectivity of RA were discussed, including the size, the period of metamaterial surfaces, and the thickness of ceramic coating. In addition, the effects of incidence angles for transverse electromagnetic (TE) and transverse magnetic (TM) polarization on the microwave absorption properties of RA were also investigated. Simulated results indicated that the microwave absorbing properties can be improved and adjusted by selecting the suitable unit dimensions of metamaterial surfaces, the RL is generally insensitive to incident angle from 0° to 30°. Finally, the design parameters of RA were optimized by Genetic Algorithms (GA) approach under normal incidence. Both the simulated results and measured results indicated that a bandwidth of reflection loss (RL) of single TiO2/Al2O3 ceramic coating below −10 dB is 0 GHz in the frequency range of X-band and Ku-band. By combination of metamaterial surfaces to ceramic coatings, a bandwidth with the reflectivity of RA below −10 dB can be obtained in the frequency range of 8.2-18 GHz for the thickness of the TiO2/Al2O3 coating of only 1.7 mm. The minimum value of reflection loss is −29 dB at about 10.6 GHz.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 687, 5 December 2016, Pages 384-388
نویسندگان
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