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A Compact Dual Band MIMO Dielectric Resonator Antenna with Improved Performance for mm-Wave Applications
Meshari D Alanazi1, Salam K Khamas1
1Communications Research Group, Department of Electronic and Electrical Engineering, The University of Sheffield, Mappin Street, Sheffield S1 3JD, UK.
Sensors (Basel, Switzerland)
|July 9, 2022
Summary
A compact multiple-input-multiple-output (MIMO) dielectric resonator antenna (DRA) for IoT sensor networks offers improved isolation and dual-band operation. This design enhances data rates and reduces antenna size, making it ideal for wireless applications.
Area of Science:
- Electromagnetics and Antenna Design
- Wireless Communication Systems
- Internet of Things (IoT) Technology
Background:
- Traditional multiple-input-multiple-output (MIMO) antennas often face challenges with element coupling and size constraints, particularly in resource-limited Internet of Things (IoT) sensor networks.
- Achieving high isolation and dual-band operation simultaneously in compact antenna designs is crucial for enhancing data rates and reliability in wireless communication.
Purpose of the Study:
- To propose and validate a compact MIMO dielectric resonator antenna (DRA) design optimized for IoT sensor networks.
- To significantly reduce electromagnetic coupling between antenna elements while maintaining a small physical footprint.
- To achieve dual-band operation for increased data throughput and improved communication performance.
Main Methods:
- A novel configuration utilizing two rectangular DRAs placed on opposite sides of a Rogers substrate.
- Employing coplanar waveguide (CPW) feeds with etched slots in an underlying metal ground plane for element excitation.
- Leveraging the substrate's geometry to enhance isolation without additional complex structures.
Main Results:
- Achieved a substantial isolation improvement of 27 dB between antenna elements, leading to a compact overall size.
- Demonstrated dual-band resonance at 28 GHz and 38 GHz with impedance matching bandwidths of 18% and 13%, respectively.
- Reported excellent performance metrics including diversity gain (DG) of 9.98 dB, envelope correlation coefficient (ECC) of 0.007, and channel capacity loss (CCL) of 0.06 bits/s/Hz.
Conclusions:
- The proposed compact MIMO DRA design effectively addresses element coupling and size limitations for IoT applications.
- The dual-band capability and high isolation contribute to enhanced data rates and reliable wireless communication.
- Experimental validation confirmed the simulation results, demonstrating the practical viability of the proposed antenna configuration.
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