Abstract:The geodesic Luneburg lens has been revisited as a suitable solution for some applications requiring directive beams in the millimetre wave band. Among its advantages, its rotational symmetry and high efficiency stand out. However, one of its drawbacks is the need for a certain height to produce the desired focusing properties of the lens. Here, we propose a low-profile solution based on rotationally-symmetric ridges that mimic, similarly to geodesic lenses, the effective refractive index of a Luneburg lens. M… Show more
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