Survey on MIMO Dielectric Resonator Antenna for IOT Wireless Applications
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Abstract
The exponential growth of the Internet of Things (IoT) has driven the demand for compact, efficient, and high-performance antennas capable of supporting reliable wireless communication. Multiple-Input Multiple-Output (MIMO) antenna systems have become a key technology in addressing challenges such as signal fading, limited bandwidth, and high data requirements in IoT networks. Among various antenna structures, Dielectric Resonator Antennas (DRAs) offer significant advantages including high radiation efficiency, low loss, compact size, and wide bandwidth, making them ideal for IoT-enabled MIMO systems. This survey provides a comprehensive review of recent advancements in MIMO DRA design tailored for IoT applications. It discusses critical design parameters such as isolation improvement, feeding techniques, radiation pattern diversity, and mutual coupling reduction. Various approaches and innovations, including the use of electromagnetic bandgap structures and AI-assisted optimization, are analyzed. Performance metrics such as gain, bandwidth, envelope correlation coefficient (ECC), and diversity gain are also examined. The study concludes by identifying existing challenges and highlighting potential future research directions, such as reconfigurable DRA arrays and conformal designs for wearable IoT devices. This survey serves as a useful reference for researchers and engineers developing next-generation wireless systems integrating MIMO DRAs into IoT platforms.
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