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In this paper, we propose a practical study of the microwave characteristics filter based on metamaterials that is characterized by an index of negative refraction. We analyze the reflection and transmission coefficients calculated from transfer matrix simulations on finite lengths of electromagnetic metamaterials, in order to determine the effective refractive index from the effective permittivity...
This paper presents square patch antenna loaded with slot split-ring resonators. Moreover, this paper discusses the performances of various dielectric substrates, having dielectric constants ranging from 2 to 5. Different substrate has been used to design the antenna such as Bakelite, Rogers RO 4232 and RT Duroid with dielectric constant of 4.8, 3.2 and 2.2, respectively. The resonance frequency is...
This paper proposes patch antenna for X-band [8.2 GHz; 12.4 GHz] and military applications, enhanced by double negative metamaterial complementary (C-DNM) cells. Two different structures will be presented and discussed, which involve: (1) C-DNM with square patch antenna, and (2) C-DNM with circular patch antenna. The antenna was designed with resonance frequency around at 12 GHz. The metamaterial...
A large number of Cu-based archaeological artefacts from the Mediterranean basin have been selected for investigation of their chemical composition, metallurgical features and corrosion products (i.e. the patina). The guidelines for the selection of the Cu-based artefacts have taken into account the representativeness of the Mediterranean archaeological context, the manufacturing technique, the degradation...
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