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Designing a Novel Hybrid Technique Based on Enhanced Performance Wideband Millimeter-Wave Antenna for Short-Range
Tanvir Islam1, Dildar Hussain2, Fahad N Alsunaydih3
1Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA.
Sensors (Basel, Switzerland)
|May 25, 2024
Summary
This study introduces a compact 4-port multiple-input-multiple-output (MIMO) antenna for millimeter-wave communication. The novel design enhances gain and bandwidth while significantly reducing coupling, outperforming existing systems.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Antenna Theory
Background:
- Millimeter-wave (mmWave) frequencies are crucial for high-speed, short-range communication systems.
- Existing multiple-input-multiple-output (MIMO) antennas often face challenges with size, coupling, and performance in mmWave bands.
Purpose of the Study:
- To design and validate a high-performance, compact 4-port MIMO antenna for millimeter-wave applications.
- To improve key antenna parameters including gain, bandwidth, and isolation while maintaining a low profile.
Main Methods:
- A single antenna element was designed by integrating rectangular and circular patches with slots on a Roger RT/Duroid 6002 substrate.
- A 4-port MIMO configuration was achieved using a novel decoupling structure with a parasitic patch and a Defected Ground Structure (DGS).
- Electromagnetic simulations were performed using Ansys HFSS, followed by prototype fabrication and testing.
Main Results:
- The proposed MIMO antenna achieved a significant reduction in coupling from -17.25 dB to -44 dB.
- Gain was improved from 9.25 dBi to 11.9 dBi, and bandwidth extended from 26.5-30.5 GHz to 25.5-30.5 GHz.
- Excellent MIMO performance parameters, including low Envelope Correlation Coefficient (ECC), high diversity gain (DG), low channel capacity loss (CCL), and favorable mean effective gain (MEG), were demonstrated.
Conclusions:
- The designed 4-port MIMO antenna offers superior performance characteristics compared to existing literature for millimeter-wave applications.
- The novel decoupling structure effectively minimizes mutual coupling and enhances overall antenna efficiency.
- The fabricated prototype validated the simulation results, confirming the antenna's suitability for short-range communication systems.
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