A 4-Port Semi-Circular Arc Slotted MIMO Antenna for Sub-6 GHz 5G Automotive Wireless Communications

Abstract

An antenna is designed in a multi-input multi-output configuration composed of four radiating elements embedded with semi-circular cuts for sub-6 GHz 5G automotive applications. The performance of the proposed design has been enhanced with the utilization of the concept of partial ground. The antenna covers the −10 dB impedance bandwidth in the frequency spectrum of sub-6 GHz, which includes 0.9 GHz, 3 GHz, and 4.7 GHz. The proposed design exhibits a wide bandwidth of 4.8 GHz, ranging from 0.7 GHz to 5.5 GHz with a peak gain of 8.8 dB in the resonating band. The isolation between the elements is well below −15 dB, and to maintain this high isolation, the antenna elements are placed at an optimized distance from each other with independent partial ground planes. The proposed design is also fabricated, and the measured results have been compared with those obtained in a simulated environment. It has been observed that both results are quite promising and well-comparable. The size of the proposed design is about (28 × 28) cm2 as the first resonating frequency is 0.9 GHz. Nevertheless, the proposed design is suitable to integrate on the rooftop of the modern passenger cars with 5G automotive wireless applications.

Cite this article as: A. Kumar, B. Chandra Sahoo, G. Singh, S. Ranjan Mishra, A. Sharma, and R. Kumar, “A 4-port semi-circular arc slotted MIMO antenna for sub-6 GHz 5G automotive wireless communications,” Electrica, 25, 0150, 2025. doi: 10.5152/electrica.2025.24150.