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Broadband 3-bit coding metasurface antenna with integrated radiation and scattering performance
Optics Express
|November 22, 2024
Summary
This study introduces an integrated metasurface antenna with a quadru-arc structure, enabling high-gain radiation and complex scattering. The design achieves multi-beam and vortex beam functionalities, alongside significant radar cross-section reduction.
Area of Science:
- Electromagnetic Metasurfaces
- Antenna Engineering
- Applied Electromagnetics
Background:
- Metasurfaces offer unique electromagnetic properties for advanced antenna designs.
- Achieving simultaneous high-gain radiation and complex scattering functions in a single antenna is challenging.
- Controlling radiation patterns and scattering characteristics requires sophisticated phase and amplitude manipulation.
Purpose of the Study:
- To design and demonstrate an integrated metasurface antenna combining radiating and scattering functionalities.
- To achieve high-gain multi-beam radiation and controlled vortex beam scattering.
- To realize wideband radar cross-section reduction using the proposed metasurface antenna.
Main Methods:
- Integration of a central radiating patch with a quadru-arc (QAS) structure.
- Phase manipulation of a power division feed network for radiation control.
- Adjustment of the QAS arc for X-polarization scattering modulation.
- Design and simulation of two distinct metasurface antenna configurations.
- Optimization using a simulated annealing-genetic algorithm for scattering function.
Main Results:
- Achieved four-beam radiation with 16 dBi gain per beam using a checkerboard feed network.
- Demonstrated vortex beam scattering with 3-bit coding.
- Obtained a deflected beam radiation pattern with 22.3 dBi gain.
- Realized wideband radar cross-section reduction from 8-24 GHz.
Conclusions:
- The proposed integrated metasurface antenna effectively achieves simultaneous high-gain radiation and complex scattering.
- The design flexibility allows for distinct functionalities, including multi-beam radiation, vortex beam scattering, and RCS reduction.
- Fabrication and measurement validated the design's performance and potential for advanced electromagnetic applications.
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