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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
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Quasi-Crystal Metasurface for Simultaneous Half- and Quarter-Wave Plate Operation
Meraj-E- Mustafa1, Muhammad Amin2, Omar Siddiqui2
1Research Institute for Microwave and Millimeter-wave Studies, National University of Sciences and Technology, Islamabad, Pakistan.
Scientific Reports
|October 26, 2018
Summary
This study introduces a novel quasi-crystal metasurface capable of acting as both a cross-polarizer and circular polarizer across multiple frequency bands. The design demonstrates broadband performance and high efficiency for polarization conversion in reflected fields.
Area of Science:
- Electromagnetics and Metamaterials
- Optics and Photonics
Background:
- Metasurfaces offer unique electromagnetic properties.
- Quasi-crystalline structures provide novel resonant behaviors.
Purpose of the Study:
- To design and demonstrate a quasi-crystal metasurface with simultaneous cross-polarization and circular polarization functionalities.
- To achieve broadband operation and high efficiency for polarization conversion.
Main Methods:
- Utilizing anisotropic patch resonators and periodic perturbations in a square lattice.
- Employing quasi-crystal design principles for electromagnetic response.
Main Results:
- Achieved broadband cross-polarization (> -3 dB) in two distinct frequency bands (10.28-15.50 GHz and 16.21-18.80 GHz).
- Demonstrated high-efficiency circular polarization conversion (10.15-10.27 GHz and 15.51-16.20 GHz).
- Suppressed co-polarization (< -10 dB) within the 10.5-15.5 GHz range.
Conclusions:
- The quasi-crystal metasurface effectively integrates cross-polarization and circular polarization capabilities.
- The broadband and efficient performance opens avenues for applications in antennas, imaging, and radar systems.
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