Eight-port Diagonal Antenna with High Isolation and High Efficiency for 5G Smartphone

Authors

  • Rui Shao College of Electronic and Information Engineering, Inner Mongolia University, Hohhot, 010021, China
  • Junlin Wang College of Electronic and Information Engineering, Inner Mongolia University, Hohhot, 010021, China
  • Xin Wang College of Electronic and Information Engineering, Inner Mongolia University, Hohhot, 010021, China
  • Yonghao Wang College of Electronic and Information Engineering, Inner Mongolia University, Hohhot, 010021, China

DOI:

https://doi.org/10.13052/2022.ACES.J.370805

Keywords:

high efficiency, High isolation, MIMO, smartphone antenna

Abstract

In this letter, an 8x8 multiple-input-multiple-output (MIMO) antenna that operates in the sub-6 GHz (4.7-5.1 GHz) spectrum for 5G MIMO smartphone applications is presented. The design consists of a fully grounded plane with closely orthogonal antenna pairs placed symmetrically on the corners of the smartphone and each antenna element consists of an F-type monopole with dimensions of 18x7.5mm2.  Firstly, the diversity characteristics of orthogonally placed antennas are used to reduce the coupling between antennas. On the other hand, diagonal antennas are connected by a neutral line (NL) to further improve isolation and etched slots on the ground to reduce the coupling between antenna pairs. A good frequency bandwidth (S11 < -10 dB) of 4.7-5.1 GHz has been obtained for the MIMO antenna, and the isolation is lower than 16 dB. In addition, total efficiency (TE) is greater than 77.5%, and the envelope correlation coefficient (ECC) is lower than 0.025. The fabricated antenna prototype is tested and offers good performance.

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Author Biographies

Rui Shao, College of Electronic and Information Engineering, Inner Mongolia University, Hohhot, 010021, China

Rui Shao received a bachelor’s degree in communication engineering from Shandong University of Technology,Zibo, China, in July 2020. From September 2020, she studies for the master’s degree of Information and Communication Engineering at Inner Mongolia University, Hohhot, China. Her research interests include research and design of 5G high isolation MIMO antenna.

Junlin Wang, College of Electronic and Information Engineering, Inner Mongolia University, Hohhot, 010021, China

Junlin Wang received a doctor’s degree in engineering in Instrument Science and Technology of Zhong-bei University. He is currently working in the College of Electronic Information Engineering, Inner Mongolia University, Hohhot, China. His research interests include micro-nano RF devices (antennas, filters, couplers, etc.) and metamaterial antennas.

Xin Wang, College of Electronic and Information Engineering, Inner Mongolia University, Hohhot, 010021, China

Xin Wang received a Ph.D. in engineering in Instrument Science and technology from Zhong-bei University, she is currently working in the College of Electronic Information Engineering, Inner Mongolia University, Hohhot. China. Her research interests include micro-nano RF devices (antennas, filters, couplers, etc.) and metamaterial antenna.

Yonghao Wang, College of Electronic and Information Engineering, Inner Mongolia University, Hohhot, 010021, China

Yonghao Wang received his bachelor’s degree in Communication Engineering from Shandong University of Science and Technology in Qingdao, China in July 2020. Since September 2020, he is studying for a master’s degree in Electronic and Communication Engineering at Inner Mongolia University, Hohhot, China. His research interests include research and design of 5G miniaturized high isolation dual-band MIMO antennas for mobile phones.

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Published

2023-01-02

How to Cite

[1]
R. . Shao, J. . Wang, X. . Wang, and Y. . Wang, “Eight-port Diagonal Antenna with High Isolation and High Efficiency for 5G Smartphone”, ACES Journal, vol. 37, no. 08, pp. 867–874, Jan. 2023.

Issue

2022: Vol 37 Iss 8

Section

Articles

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