Estudio de anillas concéntricas múltiples para su empleo en reflectarrays

Abstract

In this work, an alternative to traditional phasing elements used in the implementation of reflectarrays is analyzed. This alternative consists of structures with multiple concentric rings and the method used to analyze the phase shift produced by the elements is based on CG-FFT. The performance offered by multiple rings is compared with more traditional structures with monolayer and multilayer patches. The main advantages of multiple concentric rings are their manufacturing ease and their wide range of phase, reaching up to three or four wavelengths. On the contrary, the high sensitivity of the design curves represents their major drawback. In order to assess the effect of the sensitivity to manufacturing tolerances, a manufacturing simulation of a 625-elements reflectarray that compares the degradation introduced in the radiation pattern against the ideal conditions is presented.