Kavli Affiliate: Ran Wang
| First 5 Authors: Jun Wei Zhang, Zhen Jie Qi, Li Jie Wu, Wan Wan Cao, Xinxin Gao
| Summary:
With the versatile manipulation capability, programmable metasurfaces are
rapidly advancing in their intelligence, integration, and commercialization
levels. However, as the programmable metasurfaces scale up, their control
configuration becomes increasingly complicated, posing significant challenges
and limitations. Here, we propose a multiple-partition cross-modulation (MPCM)
programmable metasurface to enhance the wireless communication coverage with
low hardware complexity. We firstly propose an innovative encoding scheme to
multiply the control voltage vectors of row-column crossing, achieving high
beamforming precision in free space while maintaining low control hardware
complexity and reducing memory requirements for coding sequences. We then
design and fabricate an MPCM programmable metasurface to confirm the
effectiveness of the proposed encoding scheme. The simulated and experimental
results show good agreements with the theoretically calculated outcomes in beam
scanning across the E and H planes and in free-space beam pointing. The MPCM
programmable metasurface offers strong flexibility and low complexity by
allowing various numbers and combinations of partition items in modulation
methods, catering to diverse precision demands in various scenarios. We
demonstrate the performance of MPCM programmable metasurface in a realistic
indoor setting, where the transmissions of videos to specific receiver
positions are successfully achieved, surpassing the capabilities of traditional
programmable metasurfaces. We believe that the proposed programmable
metasurface has great potentials in significantly empowering the wireless
communications while addressing the challenges associated with the programmable
metasurface’s design and implementation.
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