Design of a Multi-Band MIMO Microstrip Antenna for Wi-Fi 6E Wireless Communication
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Abstract
This study introduces the design of a multi-band microstrip antenna for multiple-input multiple-output (MIMO) systems that facilitate Wi-Fi 6E wireless communication. The design utilizes various resonator structures integrated with defective ground slots to improve radiation properties and inter-port isolation. The suggested antenna comprises four elements, each proficient in functioning inside the 2.45, 5.5, and 6.5 GHz frequency bands. The design aims to reduce below the standard threshold across all four ports. Simulation results from CST Studio Suite 2024 demonstrate that the antenna attains a reflection coefficient (S11) below -10 dB and inter-port isolation below -30 dB throughout all
operational bands, indicating optimal impedance matching and efficient signal separation. The constructed prototype underwent testing using a vector network analyzer, and the obtained S-parameters closely aligned with the simulation outcomes. The 6.5 GHz band exhibited an isolation level below -34 dB and a minimum reflection coefficient of -39.87 dB, demonstrating that the proposed antenna design is suitable for high-frequency MIMO applications.
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