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Summary and Conclusions

Broadband, low-loss metamaterial surfaces provide an excellent alternative to conventional enhancements for horn feeds. Depending on the frequency band and exact application requirements, metasurface-enabled horns can reduce weight, increase bandwidth, or lower manufacturing costs. Properly engineering the dispersive characteristics of the metasurfaces can enable horns that operate over an octave bandwidth or more with negligible intrinsic losses, all while providing the benefits of conventional soft horns. For optimal performance, inhomogeneous metasurfaces can be applied as horn liners to support balanced hybrid modes and create polarization- independent patterns suitable for dual-polarized communication systems such as those commonly found on satellites.

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