Abstract
A full-wave mathematical model was developed to analyze the radiation characteristics of a spiraphase-type finite reflectarray based on ring slot resonators with stubs controlled by p-i-n diodes. The scanning characteristics of the finite 289-element reflectarray with optimized elements were calculated. According to the simulated characteristics, the optimized reflectarray provides electronic scanning in the XOZ-plane for elevation angles up to 30° with a total aperture efficiency better than 0.22. The characteristics obtained with the developed mathematical model were compared with the simulated characteristics obtained with the mathematical model of the infinite array.
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