Análise de Antenas de Abertura Alimentadas por Linhas de Fita com Substratos Uniaxiais
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Abstract
This work presents a full-wave analysis method for printed apertures in the ground plane of striplines with uniaxial substrates, assuming the optical axis normal to the planar interfaces. Working in the Fourier domain, closed form expressions for the transformed electromagnetic fields are derived. Coupled integral equations are formulated to calculate the magnetic current density across the aperture and the electric current density on the stripline. The solutions for theses equations are obtained using the method of moments in the spectral domain. Results for characteristic impedance and propagation constant of the stripline are discussed. Effects of the anisotropic ratio (ez / ex) on the normalized input impedance of a rectangular slot antenna are analyzed. As a result of our calculation it is clear that increasing this anisotropic ratio the antenna input impedance is affected by a non-negligible quantity, while the resonant frequency decreases. For isotropic structures, the numerical results are in good agreement with those computed by commercial CAD programs.
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How to Cite
V. Proaño De la Torre, A., C. da S. Lacava, J., & Cividanes, L. (2015). Análise de Antenas de Abertura Alimentadas por Linhas de Fita com Substratos Uniaxiais. Journal of Communication and Information Systems, 18(3). https://doi.org/10.14209/jcis.2003.14
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