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Double-deflection vortex beam generation using a single elliptical patch with the theory of characteristic modes
Optics Express
|May 15, 2020
Summary
A novel elliptical patch antenna generates double-deflection orbital angular momentum (OAM) vortex beams. This miniaturized antenna offers a simple, multifunctional solution for OAM beam generation, verified by simulations and measurements.
Area of Science:
- Electromagnetics and Antennas
- Wireless Communications
Background:
- Orbital angular momentum (OAM) vortex beams offer unique properties for advanced wireless communication systems.
- Generating OAM beams typically requires complex antenna arrays.
Purpose of the Study:
- To propose and analyze a single elliptical patch antenna for generating double-deflection OAM vortex beams.
- To demonstrate a miniaturized and multifunctional OAM beam generator.
Main Methods:
- Utilizing the theory of characteristic modes to analyze the physical mechanism of an equivalent uniform elliptical array (UEA).
- Employing a 3dB directional coupler for feeding the elliptical patch antenna.
Main Results:
- The proposed antenna successfully generates double-deflection vortex beams.
- Both single OAM modes and mixed OAM modes can be generated.
- Simulation and measurement results confirm the antenna's performance.
Conclusions:
- A single elliptical patch antenna is a viable and effective generator for OAM vortex beams.
- The proposed design is simple, miniaturized, and multifunctional.
- This offers a promising solution for future OAM-based communication systems.
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