An investigation on the upper limits of achievable gain for antennas based on radially inhomogeneous (gradient index) lenses is presented. This will let us provide design guidelines in terms of appropriate dimensions and material dielectric properties for achieving the optimum performance of gradient index lenses. We have seen that an upper limit of 80% aperture efficiency is obtained for any feed/lens combination.
Paraskevopoulos, A., Gashi, I., Albani, M., Maci, S. (2021). Aperture efficiency limits in radial graded index lens antennas. In 2021 Fifteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials) (pp.319-321). New York : Institute of Electrical and Electronics Engineers Inc. [10.1109/Metamaterials52332.2021.9577159].
Aperture efficiency limits in radial graded index lens antennas
Paraskevopoulos A.;Gashi I.;Albani M.;MacI S.
2021-01-01
Abstract
An investigation on the upper limits of achievable gain for antennas based on radially inhomogeneous (gradient index) lenses is presented. This will let us provide design guidelines in terms of appropriate dimensions and material dielectric properties for achieving the optimum performance of gradient index lenses. We have seen that an upper limit of 80% aperture efficiency is obtained for any feed/lens combination.
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https://hdl.handle.net/11365/1175852