Integration of frequency selective surfaces with MIMO antennas for enhanced performance in IoT and V2V communication systems.

This research explores the integration of Frequency Selective Surfaces (FSS) with Multiple-Input Multiple-Output (MIMO) antennas to enhance communication performance in Internet of Things (IoT) and Vehicle-to-Vehicle (V2V) applications operating at 5.9 GHz. Unlike existing Literature where various FSS structures are employed for performance improvement, this study presents An innovative approach by integrating a decagonal FSS unit cell with a dug-hex microstrip antenna design. The key contributions of this work include significant performance improvements, such as a gain enhancement from 1.46 dB to 6.42 dB for the single-port antenna (32 mm × 24 mm × 1.6 mm), efficiency exceeding 87.45%, And a bandwidth of 738.86 MHz. For the quad-element MIMO antenna (50 mm × 50 mm × 1.6 mm), the FSS integration results in a gain increase from 2.7 dBi to 7.4 dBi across all ports, while also improving frequency selectivity and port isolation. Notably, the MIMO antenna already exhibits good isolation between ports without FSS integration. Experimental validation confirms that the simulated and measured results align closely, demonstrating the effectiveness of the FSS-MIMO integration. This work not only highlights the potential of FSS technology for enhancing antenna performance in IoT and V2V communications but also introduces a novel, compact design that offers significant improvements in gain, efficiency, and bandwidth. The proposed approach is particularly suited for space-constrained environments, providing a valuable contribution to the development of more efficient and robust wireless communication systems, particularly for IoT networks and safer transportation systems.