Mutual Coupling Reduction in Compact MIMO Antenna Operating on 28 GHz by Using Novel Decoupling Structure.

Area of Science:

• Antenna Engineering
• Electromagnetics
• Wireless Communication

Background:

• The demand for compact, high-performance antennas is increasing for advanced wireless systems.
• Achieving wide bandwidth and high gain in a small form factor presents significant design challenges.
• Minimizing mutual coupling in multi-element antenna systems is crucial for reliable performance.

Purpose of the Study:

• To design and validate a compact, low-profile, wideband, high-gain antenna.
• To develop a two-port multiple-input-multiple-output (MIMO) antenna configuration with enhanced isolation.
• To evaluate the performance of the proposed MIMO antenna for 5G applications.

Main Methods:

• Utilizing Roger RT6002 substrate for antenna fabrication.
• Employing High Frequency Structure Simulator (HFSS) for electromagnetic (EM) simulation and analysis.
• Implementing a decoupling structure with a parasitic patch to reduce mutual coupling in the MIMO configuration.

Main Results:

• The single antenna element exhibits wideband and high-gain characteristics.
• The proposed MIMO antenna achieves a mutual coupling below -32 dB.
• Key MIMO parameters including envelope correlation coefficient (ECC), mean effective gain (MEG), diversity gain (DG), and channel capacity loss (CCL) were analyzed.

Conclusions:

• The fabricated antenna design validates the simulation results.
• The proposed compact MIMO antenna demonstrates superior performance, particularly in isolation.
• The design is recommended as a suitable candidate for future 5G devices due to its performance and compact nature.