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Dual-band millimetre wave MIMO antenna with reduced mutual coupling based on optimized parasitic structure and ground
Bashar A F Esmail1, Dustin Isleifson1, Slawomir Koziel2,3
1Department of Electrical & Computer Engineering, University of Manitoba, Winnipeg, MB, R3T 5V6, Canada.
Scientific Reports
|September 3, 2024
Summary
A novel dual-band (28/38 GHz) multiple-input-multiple-output (MIMO) antenna for 5G indoor use achieves high isolation (>32 dB) and excellent diversity performance. This antenna design is validated through simulation and measurement, confirming its suitability for 5G applications.
Area of Science:
- Electrical Engineering
- Antenna Theory
- Wireless Communications
Background:
- 5G millimeter-wave (mmWave) technology requires advanced antenna solutions for indoor applications.
- Existing antenna designs may face challenges with isolation and performance in dual-band mmWave frequencies.
- Multiple-Input-Multiple-Output (MIMO) systems are crucial for enhancing 5G data rates and reliability.
Purpose of the Study:
- To present a novel high-isolation dual-band (28/38 GHz) MIMO antenna for 5G indoor applications.
- To optimize antenna dimensions using an expedited trust-region (TR) algorithm for efficient operation.
- To enhance isolation in a four-element MIMO array through parasitic elements and ground modifications.
Main Methods:
- Design and simulation of a dual-band antenna with interconnected primary and secondary patches.
- Optimization of antenna dimensions using an expedited trust-region (TR) algorithm.
- Configuration of a four-element orthogonal MIMO array with parasitic patches and ground modifications for enhanced isolation.
- Performance evaluation including gain, isolation, envelope correlation coefficient (ECC), channel capacity loss (CCL), total active reflection coefficient (TARC), and diversity gain (DG).
Main Results:
- The designed antenna achieves a gain exceeding 7 dBi at both 28 GHz and 38 GHz.
- The four-element MIMO system demonstrates isolation greater than 32 dB at both bands after optimization.
- The MIMO system exhibits excellent diversity performance with ECC < 10⁻⁴, CCL < 0.03 bit/s/Hz, TARC < -10 dB, and DG > 9.99 dB.
- Manufacturing and testing confirmed good agreement between simulated and measured performance metrics.
Conclusions:
- The proposed dual-band MIMO antenna design effectively addresses the need for high isolation and robust performance in 5G indoor mmWave systems.
- The expedited trust-region algorithm proved efficient for optimizing complex antenna parameters.
- The validated performance metrics confirm the system's suitability for demanding 5G indoor communication environments.
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