Wideband Decoupled 8-Element MIMO Mobile Phone Antenna for Sub-6GHz 5G NR Bands

Authors

  • Jiagang He College of Electrical and Information Engineering Hunan University, Changsha, 410082, China
  • Shichao Zhu College of Electrical and Information Engineering Hunan University, Changsha, 410082, China
  • Jie Yu College of Electrical and Information Engineering Hunan University, Changsha, 410082, China
  • Hao Li College of Electrical and Information Engineering Hunan University, Changsha, 410082, China
  • Gaosheng Li College of Electrical and Information Engineering Hunan University, Changsha, 410082, China

DOI:

https://doi.org/10.13052/2022.ACES.J.371204

Keywords:

5G New Radio (5G NR), metal-frame smartphone, multiple-input–multiple-output (MIMO) antenna, slot antenna, WLAN 5 GHz band

Abstract

A broadband decoupled dual antenna pair suitable for sub-6G mobile terminal application is proposed and designed. The multiple input multiple output (MIMO) antenna pair is arranged on the metal frame of the mobile phone, with two antenna pairs on each metal frame. The slotted antenna element structure and defect ground decoupling structure are used to achieve wide band and high isolation. Based on the decoupled antenna pair, an eight-element MIMO antenna is designed. Similarly, the coupling between antenna pairs is effectively reduced by etching the decoupled defect structure of a zigzag shape on the system surface. The prototype of the antenna array is successfully fabricated and tested. Simulation and experimental results show that the proposed eight-element MIMO antenna can fully cover the n77/n78/n79 band of 5G New Radio and 5 GHz band of WLAN. The overall efficiency of the antenna is 50%-75%, the envelope correlation coefficient (ECC) is below 0.08, and the isolation between any two ports is better than 11 dB.

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Author Biographies

Jiagang He, College of Electrical and Information Engineering Hunan University, Changsha, 410082, China

Jiagang He was born in Xiangtan, Hunan province, China, in 1997. He received his Bachelor’s degree from the College of Electronic Science and Technology, Hunan University of Technology, Zhuzhou, China, in 2019. He is now studying for a postgraduate degree at the College of Electronic Science and Technology, Hunan University. His research interests are terminal antenna and EMC.

Shichao Zhu, College of Electrical and Information Engineering Hunan University, Changsha, 410082, China

Shichao Zhu received his Bachelor’s degree from the School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang, China, in 2020. He is currently pursuing a Master’s degree at the College of Electrical and Information Engineering, Hunan University, Changsha, China, under the supervision of Prof. G. S. Li. His research interests include reconfigurable antennas, electromagnetic metamaterials and their antenna applications.

Jie Yu, College of Electrical and Information Engineering Hunan University, Changsha, 410082, China

Jie Yu was born in Xinyang, Henan province, China, in 1998. He received his Bachelor’s degree in Optoelectronic Information Science and Engineering from Changsha University of Science and Technology, Changsha, China, in 2019. He is currently working as a postgraduate at Hunan University. His research interest is liquid antennas.

Hao Li, College of Electrical and Information Engineering Hunan University, Changsha, 410082, China

Hao Li is an associate professor at the College of Electrical and Information Engineering, Hunan University, Changsha, China. His research interests include microwave dielectric materials and devices for microwave communication.

Gaosheng Li, College of Electrical and Information Engineering Hunan University, Changsha, 410082, China

Gaosheng Li (M’08, SM’19) received his B.S. degree in Electromagnetic Fields and Microwaves in 2002 from the National University of Defense Technology (NUDT), Changsha, China. His M.S. and Ph. D. degrees were in Electronic Science and Technology from the same university, in 2004 and 2013, respectively.

He was with NUDT as a Teaching Assistant from 2004 to 2006, as a Lecturer from 2006 to 2011, and then as an Associate Professor from 2011 to 2017. He joined Hunan University as a Professor in 2018. From 2014 to 2016, he was with Nanjing University of Aeronautics and Astronautics (NUAA) and Wuxi Huace Electronic Systems Co., Ltd., China as a postdoctoral Research Fellow. From 2016 to 2017, he was a Visiting Scholar at the University of Liverpool (UoL), United Kingdom, sponsored by the China Scholarship Council (CSC). He is a Senior Member of the IEEE. His research interests include antennas and propagation (AP), electromagnetic compatibility (EMC), and wireless propagation and microwave systems.

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Published

2022-12-31

How to Cite

[1]
J. . He, S. . Zhu, J. . Yu, H. . Li, and G. . Li, “Wideband Decoupled 8-Element MIMO Mobile Phone Antenna for Sub-6GHz 5G NR Bands”, ACES Journal, vol. 37, no. 12, pp. 1208–1215, Dec. 2022.

Issue

2022: Vol 37 Iss 12

Section

Antennas, Metasurfaces, and Testing Methodologies for 5G/6G Communication