A 1-bit digital reconfigurable reflective metasurface (RRM) with 20 Ã?â?? 20 cells is presented,\nfabricated and measured for beam-scanning performance in this paper. The cell is designed with a\nsingle layer structure and one varactor diode, controlled electronically. The cellââ?¬â?¢s phase compensation\nis over 180ââ??¦ between 3 GHz and 4 GHz and the two states with 180ââ??¦ phase difference are selected\nas coding ââ?¬Å?0ââ?¬Â and coding ââ?¬Å?1ââ?¬Â. By the fuzzy quantification theory, all the elements on the RRM are\nset to be coding ââ?¬Å?0ââ?¬Â or coding ââ?¬Å?1ââ?¬Â according to the phase compensation calculated by MATLAB.\nFurthermore, by changing the coding of the RRM, it can achieve beam-scanning. The simulation\nresults show that the beam-scanning range is over Ã?±60ââ??¦. The RRM prototype is fabricated and\nexperimentally tested for principle. The gain of the RRM is 18 dB and the 3 dB bandwidth is about\n16.6%. The 1-bit digital RRM is preferred in practical implementations due to less error and much\neasier bias voltage control. The proposed RRM successfully balances the performance and system\ncomplexity, especially in the large-scale antenna designs. The experimental and simulated results are\nin good agreement to prove the correctness and feasibility of the design of the 1-bit digital RRM.
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