نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه تربیت دبیر شهید رجایی-دانشکده مهندسی برق و کامپیوتر
2 دانشگاه شهید رجایی
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
This paper presents a rigorous and comprehensive method for retrieving the electromagnetic constitutive parameters of a slab of metamaterial from the measurement or numerically calculation of scattering parameters. The main problem in this process is the doubtfulness exists in the phase of the transmitted field or the correct branch of logarithmic function appears in relevant equations.The novelty introduced here is on applying the Kramers-Kronig(K-K) relation to the imaginary part of refractive index and therefore obtaining its real part with less ambiguity. In Addition, by means of the mentioned approach one can obtain full retrieval results even where the imaginary part of electric permittivity or magnetic
permeability becomes negative. Indeed, this method can be applied to an extensive range of materials independent of their operational frequency.
کلیدواژهها [English]
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