State-of-the-Art of Smart MIMO Antennas

Dear Colleagues,

After the technological implementation  of the first version of the fifth-generation (5G) new radio (NR) standard through massive multiple-input multiple-output (MIMO) systems, there are still many challenges remaining to overcome in 6G and beyond with the target performance improvements in terms of  higher data rates, lower latencies, better energy efficiency, and improved robustness. Multiple antenna technologies are, therefore, important key components to addressing the technical challenges in almost all recent wireless generations. Alternative to the conventional phased antenna arrays employed for diversity enhancement to improve the sensitivity to one signal, MIMO systems are composed of antenna arrays jointly at both transmiting and receiving sides in a communication link to spatially multiplex signals over multipath or near-field channels.

MIMO systems are continuously evolving with the novel antenna design strategies as a research topic in addition to the enhanced massive MIMO techniques and array architectures with high potential solution for the system requirements in 6G and beyond. This Special Issue aims to highlight recent research on multiple antenna technologies.

Potential research topics include, but are not limited to:

• MIMO channel modeling theory;
• Artifical material based compact MIMO antenna design;
• Multi-band/wideband MIMO antenna design;
• Machine learning assisted MIMO antenna design;
• Smart reconfigurable MIMO antennas;
• Implantable/Wearable MIMO antennas;
• Optimum MIMO antenna selection;
• Antenna mutual coupling improvement techniques;
• Lens antenna array and intelligent reflecting surface design for mmwave massive MIMO systems.

Dr. Merih Palandoken
Prof. Dr. Francisco Falcone
Guest Editors

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