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New Compact Antenna Array for MIMO Internet of Things Applications
Wazie M Abdulkawi1,2, Mohammed A Alqaisei1, Abdel-Fattah A Sheta1
1Electrical Engineering Department, King Saud University, Riyadh 11421, Saudi Arabia.
Micromachines
|September 23, 2022
Summary
A novel communication system enhances Internet of Things (IoT) connectivity in desert regions using a specialized six-element antenna array and adaptive beamforming. This system achieves extended coverage and improved signal quality for remote applications.
Area of Science:
- Electrical Engineering
- Wireless Communication
- Antenna Design
Background:
- Internet of Things (IoT) applications require robust communication systems, especially in remote areas like deserts.
- Existing regional area network solutions face challenges with extended coverage and signal reliability in harsh environments.
Purpose of the Study:
- To propose and analyze a communication system for IoT in desert areas with extended network coverage.
- To optimize a six-element antenna array for size, element coupling, and radiation efficiency at 2.45 GHz.
- To implement adaptive beamforming for interference suppression and signal enhancement.
Main Methods:
- Developed a six-element antenna array optimized for reduced size and element coupling (< -20 dB).
- Employed Multiple-Input Multiple-Output (MIMO) for diversity gain and spectral efficiency analysis.
- Utilized root MUSIC algorithm for Direction of Arrival (DOA) estimation and Minimum Variance Distortionless Response (MVDR) for beamforming.
- Evaluated antenna performance including radiation efficiency (>65%), Envelope Correlation Coefficient (ECC) (<0.013), Mean Effective Gain (MEG) (>1 dB), Diversity Gain (>9.9 dB), and Channel Capacity Loss (CCL) (<0.4 bits/s/Hz).
Main Results:
- The antenna array demonstrated high radiation efficiency (>65% bandwidth, peak 73% at 2.45 GHz).
- MIMO analysis confirmed significant diversity gain and spectral efficiency.
- Adaptive beamforming effectively suppressed interference, enhancing the Signal-to-Interference Noise Ratio (SINR).
- The system achieved data rates >50 kbps over 100 km with limited power signals.
Conclusions:
- The proposed communication system, integrating a specialized antenna array and adaptive beamforming, is highly effective for IoT in desert environments.
- The system provides extended coverage, improved signal quality, and reliable data transmission over long distances.
- This solution addresses critical communication needs for remote IoT deployments.
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