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2024-10-31
A Dual-Band High-Isolated MIMO Antenna Based on Compensation Network for 5G Coal Mine Applications
By
Progress In Electromagnetics Research Letters, Vol. 123, 47-54, 2025
Abstract
A dual-band MIMO antenna with high isolation is designed in this paper for coal mine applications. Each of the two elements in the designed MIMO antenna is composed of a bident-shaped monopole structure which is designed to cover the 5G NR frequency region (2.51-2.67 GHz, 3.4-3.6 GHz) allocated for coal mine scenario. The two elements are symmetrically placed to achieve high isolation at lower frequency region with an element spacing of 0.09λ at the lowest operating frequency. To further reduce the mutual coupling between the two elements, the decoupling network technique is utilized. In particular, a neutralization line is loaded with an adjustable capacitor and two adjustable inductors on the ground. In this way, an isolation of higher than 20 dB is achieved over the two operating frequency bands for the MIMO antenna, i.e., the isolation is increased by more than 11 dB and 10 dB for the lower and higher bands, respectively. Besides, the good performance of the designed MIMO antenna in terms of correlation values and diversity gain makes it a suitable candidate for 5G MIMO applications under coal mine scenarios.
Citation
Yanhong Xu, Nanyue Li, Can Cui, Xuhui Fan, Jianqiang Hou, and Anyi Wang, "A Dual-Band High-Isolated MIMO Antenna Based on Compensation Network for 5G Coal Mine Applications," Progress In Electromagnetics Research Letters, Vol. 123, 47-54, 2025.
doi:10.2528/PIERL24082804
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