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Decoupling of Dual-Polarized Antenna Arrays Using Non-Resonant Metasurface
Shengyuan Luo1, Peng Mei1, Yiming Zhang2
1Antenna, Propagations and Millimeter-Wave Systems (APMS) Section, Aalborg University, 9220 Aalborg, Denmark.
Sensors (Basel, Switzerland)
|January 8, 2023
Summary
A novel non-resonant metasurface (NRMS) enhances isolation in dual-polarized antenna arrays. This metasurface technology suppresses mutual coupling while maintaining radiation patterns, promising for massive MIMO systems.
Area of Science:
- Electromagnetics and Metamaterials
- Antenna Array Design
- Wireless Communication Systems
Background:
- Large-scale antenna arrays, especially dual-polarized ones, suffer from mutual coupling, degrading performance.
- Improving isolation is crucial for advanced systems like massive MIMO.
- Existing solutions often compromise bandwidth or radiation characteristics.
Purpose of the Study:
- To introduce a non-resonant metasurface (NRMS) concept for enhancing isolation in wideband, dual-polarized antenna arrays.
- To demonstrate the NRMS's ability to suppress mutual coupling without affecting normal-direction wave propagation.
- To validate the effectiveness of the NRMS through simulation and experimental verification.
Main Methods:
- Designing a non-resonant metasurface (NRMS) with specific electromagnetic properties (negative permeability, positive permittivity).
- Integrating the NRMS with a 4x4 dual-polarized antenna array.
- Conducting electromagnetic simulations to predict isolation improvements.
- Experimentally verifying the simulated results.
Main Results:
- The NRMS exhibits stable negative permeability and positive permittivity over a wide band.
- Simulations and experiments show isolation over 24 dB from 4.36 to 4.94 GHz.
- The NRMS preserves the radiation patterns of the antenna elements.
- The proposed NRMS has a simple structure.
Conclusions:
- The developed NRMS effectively improves isolation in dual-polarized antenna arrays.
- The NRMS technology is suitable for wideband applications and preserves essential antenna characteristics.
- The simple design makes the NRMS a promising candidate for massive MIMO antenna arrays.
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