دانلود ترجمه مقاله اصل طراحی جذب های موج یک یا دو لایه حاوی مواد چپگرد
عنوان فایل ترجمه فارسی: اصل طراحی جاذب های موج تک لایه یا دو لایه حاوی مواد چپگرد.
عنوان نسخه انگلیسی: Design principle of single- or double-layer wave-absorbers containing left-handed materials
مرتبط با رشته : برق
تعداد صفحات مقاله فارسی: ۱۳ صفحه
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قسمتی از متن انگلیسی:
ndex of the LHM is just the negative value of that of the RHM layer, which is feasible, the refractive angle a can be calculated using Snell’s low. It is also supposed that the thickness of the RHM is just a quarter of the wavelength inside the RHM at 10 GHz according to Eq. (16) but with + sign for the values of the l. To determine the parameters of the LHM layer, Eqs. (35)–(۳۸) are used. Then exploiting the relationship between the structure parameters of the cell of LHM and the permittivity and the permeability, one can design and work out suitable LHM layer [21,22]. After this, employing Eq. (51), the values of Zk1eff are obtained. Then exploiting Eq. (9), the amplitude reflective coefficient is work out. We define the reflection loss as RdB = 20log(|R|). Here, the absolute value of R is adopted for convenience, because the R has different signs for TE wave and TM wave, respectively. It should be noted that all these parameters are functions of frequency. The calculated reflection loss with 30 incidence for the frequency varying from 4 GHz to 18 GHz is shown in Fig. 3, from which one can see the reflection loss is very large. It should be pointed out that this phenomenon is impossible for practical cases because that it is very difficult to make the thicknesses of the layers and the constitutive parameters of the RHM and LHM just be the values satisfying the conditions making R = 0. However, these values may be used as references to practically available ones and the further optimization is suggested.
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