A thin printed metasurface for microwave refraction

This paper presents a novel thin metasurface for microwave refraction. The metasurface is based on the new concept of establishing orthogonal electric and magnetic currents (Huygens sources) on a surface thus physically implementing the equivalence principle. Such thin Huygens Metasurfaces can be used for refraction, focusing and general beam shaping. Here we discuss the design procedure and experimental validation of such a metasurface for 1D refraction. In contrast to previous work, the proposed metasurface does not require stacked layers, but it comprises collocated electric and magnetic dipoles printed on a single panel. This can be represented in one layer of lattice cells, and its behavior described using transmission-line theory. This makes it electrically thin and readily scalable to millimeter-wave frequencies and beyond.