A Compact 26/39 GHz Millimeter wave MIMO Antenna Design for 5G IoT Applications

This work presents a compact dual-band two element multi-input-multi-output (MIMO) antenna design for fifth generation (5G) IoT applications. The antenna covers the millimeter wave (mmWave) frequencies of 26.5 to 27.1 GHz and 39.15 to 40.69 GHz. Each MIMO element consists of meandered patch with ground plane defected by two symmetrical rectangular slots. The antenna is realised using Rogers 5880 substrate and excited by a 50 Ω coaxial feed. The size of the antenna is 10 × 28 × 0.787 mm3 and offers a peak gain of 7.29 dBi and 7.45 dBi respectively at 26.8 and 39.8 GHz resonant frequencies. The MIMO parameters of the antenna also show the good performance characteristics across the two operating bands. The antenna prototype is fabricated to verify the experimental results, which show an excellent agreement with that of simulation results. The proposed antenna outperforms the related antenna designs with features like compact design, low ECC and higher gain, isolation and efficiency.