Frequency-multiplexed Holographic-Reflective Metasurface for Multi-beam Generation

A holographic-reflective metasurface for the independent manipulation of free-space waves and surface waves is proposed in this paper. By constructing the surface impedance distribution and reflection phase distribution on the same aperture respectively, the conversion of surface waves into leaky waves at low frequencies and the wavefront manipulation of reflected waves at high frequencies are realized. When the metasurface operates in the holographic mode, a gain of over 13 dB is achieved in the 9.9-10.4 GHz band; when it operates in the reflective mode, a gain of over 24 dB is achieved in the 21.9-25.5 GHz band. This metasurface has advantages of low cost, high integration and functional multiplexing, and can be applied to radar detection aspects.