Abstract
The Sierpinski Gasket fractal antennas can provide the best generic multiband behaviour among the several planar feed monopole antennas available for use in automotive applications. The Gasket geometries used in antennas can be classical, scale perturbed, or both scale and flare perturbed. When used in the planar feed configuration, the classical and perturbed Gasket fractal antennas suffer from considerable reflections at one or more multiband frequencies, rendering these frequencies unsuitable for usage. Therefore, a design modification in these antennas is essential. A novel design modification has been proposed in the Sierpinski Gasket fractal antennas in the present research work by utilizing metamaterial engineered substrates. It has been found that the metamaterials not only reduce reflections but these materials also lower Gasket antenna frequencies, thereby, facilitating reduction in the antenna size. The findings have been validated through the experimental investigations. The comprehensive design analysis presented in the present paper shall prove highly beneficial to the antenna designers in rapidly customizing the vehicular antennas.
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