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Schematic view of the lens antenna composed of a planar metamaterial-based lens and a Vivaldi-type antenna feed placed in a quasi-TEM parallel-plate waveguide. The geometrical dimensions are L = 190 mm, W = 130 mm, h = 11 mm, ds = 51.5 mm, and R = 56 mm.
(a) Simulation setup used to retrieve the effective constitutive parameters of the CCR cells. (b) Reflection and transmission responses of atypical CCR structure with lx = ly = 3.3 mm, which is used in the non-resonant frequency regime such that it presents broadband features in the 8-12 GHz band (less than 10% variation over the whole band). (c) Extracted effective index of the CCR structure. The geometrical dimensions are lc = 18.5 mm, h = 11 mm, g = 1 mm, a = 3.6 mm, and c = 0.3 mm.
Measured electric near-field distribution and H-plane (horizontal) far-field radiation patterns of the metamaterial-based lens antenna in the 8-12 GHz frequency band.
Dimensions of the CCR cells and their effective index in the different discretized zones of the HMFE lens.
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