Multi-Channel Beam-Splitting Metasurface for Millimeter Wave Communication Systems

In this paper, we propose the design of a metasurface based on the methodology of high periodicity super-cell designs (5.76 lambda) and impedance modulation to achieve various numbers of beam splitting angles while maintaining the same coverage at multiple incident angles for millimeter wave (mm-Wave) frequency. Our proposed design achieves a reflection efficiency of up to 96.65% and 97.36% in TE and TM mode at 28 GHz with 11 beam directions theta(i) = 0 degrees, theta(a) = 0 degrees, +/- 10 degrees, +/- 20.32 degrees, +/- 31.40 degrees, +/- 44 degrees and +/- 60.25 degrees while maintaining similar performances for various incident angles which makes it a valuable complementary solution to enhance coverage for mm-Wave communication applications compared to conventional beam splitters. The performance of the metasurface is determined by calculating the bistatic radar cross section (RCS) compared to a flat metallic plate of similar dimensions. A prototype is fabricated and tested to validate the simulation results.