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A smart millimeter-wave base station for 6G application based on programmable metasurface.

Jun Wei Zhang1, Zhen Jie Qi1, Li Jie Wu1

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This study introduces a large-scale, 2-bit programmable metasurface for 6G communications, enhancing millimeter-wave base stations. The novel design improves wireless communication performance in realistic scenarios.

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Area of Science:

  • Electromagnetics
  • Information Science
  • Wireless Communications

Background:

  • Programmable metasurfaces offer advanced electromagnetic (EM) phenomena and applications.
  • Current implementations in sub-6G bands have limitations in array scale and phase control, hindering performance.
  • Reconfigurable intelligent surfaces (RIS) are crucial for enhancing signal coverage and transmission quality.

Purpose of the Study:

  • To propose a large-scale, 2-bit millimeter-wave programmable metasurface for integrated smart base station frameworks in 6G communications.
  • To demonstrate the potential of metasurfaces in next-generation mobile communications.

Main Methods:

  • Developed a 30x30 meta-array with 1800 positive-intrinsic-negative (PIN) diodes for 2-bit phase control.
  • Integrated a dish-cone antenna as the feeding source.
  • Utilized a field-programmable gate array (FPGA) for autonomous control of PIN diodes and EM response adjustment.

Main Results:

  • Validated the performance of the millimeter-wave base station assisted by the programmable metasurface in a realistic indoor scenario.
  • Demonstrated smart multi-user information transmissions in a four-stream wireless communication setup using four 30x30 arrays.

Conclusions:

  • The proposed large-scale, 2-bit millimeter-wave programmable metasurface shows significant potential for novel and intelligent base station development.
  • This work offers valuable insights for advancing next-generation mobile communications through advanced metasurface technology.