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Additively-Manufactured Broadband Metamaterial-Based Luneburg Lens for Flexible Beam Scanning
Xuanjing Li1,2, Rui Feng1,2, Quilin Tan1,2
1Key Laboratory of Micro/Nano Devices and Systems, Ministry of Education, North University of China, Taiyuan 030051, China.
Materials (Basel, Switzerland)
|June 27, 2024
Summary
This study introduces a novel metamaterial Luneburg lens-antenna for multi-beam microwave applications. It achieves wide-angle scanning and high gain across a broad frequency range, ideal for advanced communication and sensing systems.
Area of Science:
- Electromagnetics and Metamaterials
- Antenna Engineering
- Microwave Systems
Background:
- Multi-beam antennas are crucial for modern communication systems.
- Existing designs often face limitations in bandwidth and polarization sensitivity.
- Metamaterials offer unique electromagnetic properties for antenna enhancement.
Purpose of the Study:
- To propose and validate a broadband metamaterial-based multi-beam Luneburg lens-antenna.
- To achieve low polarization sensitivity and wide beam scanning angles.
- To demonstrate its suitability for various microwave applications.
Main Methods:
- Constructing a Luneburg lens using additively manufactured spherical layers.
- Tuning effective permittivity by adjusting dielectric material to air ratio.
- Utilizing flexible microstrip patch antennas as primary feeds.
Main Results:
- Achieved a ±72° beam scanning angle.
- Operated over a broad frequency range from 2 GHz to 8 GHz.
- Demonstrated a gain between 15.3 dBi and 22 dBi.
- Exhibited low polarization sensitivity.
Conclusions:
- The proposed Luneburg lens-antenna offers broadband, wide-angle multi-beam capabilities.
- Its performance suggests significant potential in mobile communications, radar, and remote sensing.
- Additive manufacturing enables efficient fabrication of such advanced antenna systems.
