Extremely High Isolation of MIMO Antenna‐Based Parasitic Element and U‐Slot DGS for 5G V2X Applications
Syaiful Anas Suhaimi, Samir Salem Al‐Bawri, Hasliza A. Rahim, Samia Larguech, Md Moniruzzaman, Mohammad Tariqul IslamABSTRACT
This paper presents an extremely high isolation of a Multiple‐Input Multiple‐Output (MIMO) antenna incorporating a parasitic element on a U‐slot Defected Ground Structure (DGS) for 5G Vehicle‐to‐Everything (V2X) communication. MIMO antenna was designed using a Rogers RT5880 substrate with a low‐profile 1.49 λ ×1.49 λ × 0.031 λ. The antenna operates at 5.9 GHz and exhibits superior isolation characteristics, achieving a mutual coupling level of as low as −48 dB. The design also achieves a high gain of 8.5 dBi, a high bandwidth (5.8–6.08 GHz) of 4.74% and an exceptional radiation efficiency of 98%. The novelty of this work lies in the combined use of a parasitic strip line structure and a U‐slot DGS arranged strategically to suppress mutual coupling without increasing the antenna footprint. Both simulated and measured results confirm the proposed antenna's suitability for next‐generation 5G V2X systems.