“Mutual Coupling Reduction in 2.4 GHz Microstrip Patch Antenna Array Using Metamaterial Structures”

Abstract

This paper presents a microstrip patch antenna array integrated with metamaterial (MTM) to improve performance at the 2.4 GHz frequency band. The antenna array consists of two patch elements placed side by side on an FR4 epoxy substrate with coaxial feeding. To address mutual coupling, a metamaterial structure based on concentric split rings is introduced between the antenna elements. The results demonstrate that the inclusion of metamaterial significantly reduces mutual coupling from -28 dB to -54 dB, enhances the antenna gain from 2.77 dB to 3.61 dB, and maintains stable resonant frequency and return loss. The proposed design not only improves isolation between closely spaced antennas but also enhances radiation performance, making it suitable for Wi-Fi and other wireless communication applications.