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Dual-Polarized Isolation-Improved MIMO Inverted-F Antenna Through an L-Shaped Decoupler.
Mohammed A Hassan1, Ahmad H Abdelgwad2
1Electrical Engineering Department, College of Engineering, King Faisal University, Al-Ahsa 31982, Saudi Arabia.
Sensors (Basel, Switzerland)
|May 27, 2026
Summary
This study presents a compact, dual-polarized MIMO antenna for WLAN, featuring an L-shaped parasitic element for enhanced isolation. The design ensures robust performance with high efficiency and low correlation for modern wireless systems.
Area of Science:
- Electrical Engineering
- Antenna Theory
- Wireless Communications
Background:
- Modern wireless systems demand compact, high-performance antennas.
- Multiple-Input Multiple-Output (MIMO) technology enhances data rates and reliability.
- Dual-polarization antennas offer improved spectral efficiency and diversity.
Purpose of the Study:
- To introduce a compact MIMO antenna system for WLAN applications.
- To achieve dual polarization, high isolation, and pattern diversity.
- To reduce mutual coupling and enhance isolation using a parasitic element.
Main Methods:
- Designed two orthogonally positioned inverted-F antenna (IFA) elements for the 2.4 GHz WLAN band.
- Utilized perpendicular feeds for polarization diversity.
- Incorporated an L-shaped metallic parasitic element to reduce mutual coupling.
Main Results:
- Achieved a wide operating bandwidth (2.2–2.7 GHz).
- Demonstrated excellent port isolation (S21 < -30 dB at 2.4 GHz).
- Reported high efficiency (~89%), peak gain (3.3 dBi), low ECC (0.0004), and high diversity gain (~10 dB).
Conclusions:
- The proposed compact MIMO antenna with an L-parasitic element offers excellent performance characteristics.
- The design is suitable for low-profile, modern WLAN MIMO systems.
- Experimental results validate the simulated performance, confirming its practical applicability.
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