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Hybrid-mechanism metasurface-based wideband low-scattering antenna array
Optics Express
|July 30, 2025
Summary
This study introduces a novel metasurface antenna array that significantly reduces radar cross section (RCS) for both co-polarized and cross-polarized signals. The design achieves wideband low-scattering performance through a hybrid scattering suppression mechanism.
Area of Science:
- Electromagnetics
- Materials Science
- Antenna Engineering
Background:
- Metasurfaces offer unique electromagnetic properties for antenna design.
- Reducing radar cross section (RCS) is crucial for stealth applications.
- Wideband low-scattering antenna arrays require advanced design strategies.
Purpose of the Study:
- To design and optimize a metasurface-based wideband low-RCS antenna array.
- To implement a hybrid radar cross section (RCS) reduction mechanism.
- To achieve stable reflection phase gradient (RPG) for cross-polarized (cr-pol) incidence.
Main Methods:
- Direct scattering suppression using a hybrid RCS reduction mechanism.
- Metasurface-based radiating patches optimized for stable RPG under cr-pol incidence.
- Introduction of extra metal strips for co-polarized (co-pol) incidence to control reflection phase.
Main Results:
- Achieved over 6 dB RCS reduction from 7.3-16.6 GHz (co-pol) and 6.7-16 GHz (cr-pol) normal incidence.
- Demonstrated wideband low-scattering property for both polarizations.
- Verified effectiveness through prototype fabrication and measurement.
Conclusions:
- The proposed hybrid RCS reduction mechanism effectively enhances RCS reduction bandwidth.
- Metasurface antenna arrays can achieve significant wideband low-scattering performance.
- Integrated design approach offers superior RCS reduction compared to conventional methods.
