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This paper investigates the performance of the single slot ring element for Ka-band reflectarray designs. Using the element rotation technique, two Ka-band circularly polarized reflectarray prototypes are designed and implemented, with different thicknesses of the substrate. The bandwidth is significantly enhanced when a thick substrate is used.
In the work of Shafari and Shafai (2009) a parametric study, using Ansoft HFSS, on the effect of aperture diameter on transmission properties of an array of apertures is performed. The unit cell included a centered circular aperture on a ground plane, where aperture diameter was swept over a wide range. The unit cell was chosen to have the same transverse dimensions as X-band waveguide, i.e. Sx =...
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