Guided and Space Waves Multiplexed Metasurface for Advanced Electromagnetic Functionalities in Microwave Region

Area of Science:

• Electromagnetism
• Materials Science
• Wave Physics

Background:

• Metasurfaces offer advanced control of electromagnetic (EM) waves.
• Simultaneously shaping guided waves and manipulating spatial incident waves with a single metasurface remains a challenge.

Purpose of the Study:

• To propose a novel class of metasurfaces capable of multiplexing guided and space waves.
• To achieve advanced EM functionalities in microwave regions for applications in radar, wireless communications, and wireless power transfer (WPT).

Main Methods:

• Designed meta-atoms with polarization-dependent radiation and reflection properties.
• Independently and simultaneously manipulated complex amplitude of guided waves and reflection phase of space incident waves.
• Demonstrated functionalities including low-sidelobe microwave antennas with reduced radar cross section (RCS), multifunctional WPT, and feed multiplexed holograms.

Main Results:

• Achieved arbitrary radiation and reflection functionalities without crosstalk.
• Validated far-field characteristics (±30° beams, RCS reduction) via simulations and measurements.
• Confirmed near-field shaping feasibility through hologram intensity distribution agreement between simulations and experiments.

Conclusions:

• The proposed metasurfaces significantly expand EM wave manipulation capabilities.
• Stimulated development of advanced multifunctional metadevices for diverse applications.