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Broadband Low-Permittivity Elliptical Lens Fed by a Leaky-Wave Antenna for Communications Applications

In this paper, a leaky-wave fed lens antenna working at G-band for future XG communications is presented. A lens with a diameter of 16λ0is proposed in HDPE material with a feed matching better than −10dB over a 45% of relative bandwidth. Analytical tools have been applied to achieve an aperture efficiency higher than 80% in the entire frequency band. One prototype have been fabricated and measured and the results agree well with the generated from both analytical approach and full-wave simulations.