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A broadband double negative media (DNG) is proposed and investigated theoretically in this paper. The top view of structure proposed in this paper is a combination of ellipses with minor axis at 6 mm and major axis at 16 mm, rotating 45 degrees each time. The combination of ellipses is a gradient structure at the boundary, so that there are strong superposition of coupling between each two ellipses...
In this paper, ultrathin metasurface based on phase discontinuities is proposed to manipulate electromagnetic waves in the microwave region. The gradual phase changes accumulated along the transmission path in the conventional lens are substituted with abrupt phase changes at the interface of the metasurface, which are realized by the Pancharatnam–Berry phase element. An ultrathin metasurface with...
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