DOI: 10.1109/TMTT.2025.3641252   IEEEXplore: https://ieeexplore.ieee.org/document/11313688    

Moiré-effect-inspired reconfigurable electromagnetic wavefront modulated system based on cascaded metasurfaces.

12.5 – 15 GHz

By rotating the cascaded metasurfaces, the Moiré effect is excited, achieving changes in the equivalent total phase to realize the reconfigurable tensor angle of the conical beam. The metasurfaces consist of two metal layers separated by a dielectric layer and interconnected by vias. Metasurface 1 with a metal square ring and a crossed-diploe structure achieves 290° phase shift range, and metasurface 2 with helical dipoles added to the first surface’s structure achieves 72° phase shift range for 360° phase coverage under dual polarization. The metal square rings and interconnect vias significantly reduce transmission loss.

Compact and cost-effective reconfigurable conical beamforming in in-vehicle satellite communications, UAV satellite communications, airborne relay nodes and indoor communications in 6G wireless systems.

13.3 dBi gain at 20° tensor angle of the conical beam, 12.4 dBi gain at 30°, 10.1 dBi gain at 40° all at 13.8 GHz; sidelobe levels below -9 dB, and cross-polarization below -28 dB About 3° angular deviation at 12.7 and 14.8 GHz;