A Minkowski fractal-shaped patch is proposed for thedesign of a reduced-size reflectarray element. The intrinsic miniaturizationcapability of the fractal geometry is fully exploited byleaving unchanged the patch length, while using the fractal scalingfactor to obtain a good reflectarray phase agility. The achieved sizereduction effect allows to choose array grids with smaller interelementspacing, thus offering the opportunity to have wide-anglescanning capabilities. As validation test, a fractal-shaped X-bandreflectarray element, embedded into a 0.3 lambda x 0.3 lambda cell, is designedto give a high phase agility range, greater than 300 . Furthermore,the design and the experimental validation of a 15 x 15 reflectarrayprototype are presented to prove the fixed-beam large anglepointing ability.

Miniaturized fractal reflectarray element using fixed-size patch

COSTANZO, Sandra;VENNERI, FRANCESCA
2014

Abstract

A Minkowski fractal-shaped patch is proposed for thedesign of a reduced-size reflectarray element. The intrinsic miniaturizationcapability of the fractal geometry is fully exploited byleaving unchanged the patch length, while using the fractal scalingfactor to obtain a good reflectarray phase agility. The achieved sizereduction effect allows to choose array grids with smaller interelementspacing, thus offering the opportunity to have wide-anglescanning capabilities. As validation test, a fractal-shaped X-bandreflectarray element, embedded into a 0.3 lambda x 0.3 lambda cell, is designedto give a high phase agility range, greater than 300 . Furthermore,the design and the experimental validation of a 15 x 15 reflectarrayprototype are presented to prove the fixed-beam large anglepointing ability.
arrays; reflectarrays; fractal antennas
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11770/137236
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