Designing Uncorrelated Multiple Antennas with Round Patterns Using Handset Metal Frames

LI Hui; XU Jialu; DIAO Yunze; ZHOU Changfei

doi:10.1049/cje.2022.00.243

Volume 31 Issue 6

Nov. 2022

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LI Hui, XU Jialu, DIAO Yunze, et al. “Designing Uncorrelated Multiple Antennas with Round Patterns Using Handset Metal Frames”. Chinese Journal of Electronics, vol. 31 no. 6. doi: 10.1049/cje.2022.00.243

Citation:

LI Hui, XU Jialu, DIAO Yunze, et al. “Designing Uncorrelated Multiple Antennas with Round Patterns Using Handset Metal Frames”. Chinese Journal of Electronics, vol. 31 no. 6. doi: 10.1049/cje.2022.00.243

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Designing Uncorrelated Multiple Antennas with Round Patterns Using Handset Metal Frames

doi: 10.1049/cje.2022.00.243

1.
School of Information and Communication Engineering, Dalian University of Technology, Dalian 116024, China
2.
Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan

Funds: This work was supported by the National Natural Science Foundation of China (61971087) and LiaoNing Revitalization Talents Program (XLYC1907074)

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Author Bio:
Hui LI received the Ph.D. degree in electrical engineering from the Royal Institute of Technology (KTH), Sweden, in 2012. From 2012 to 2015, she was a Post-doc Researcher at the Department of Electrical and Information Technology, Lund University. Since 2015, she joined Dalian University of Technology and is now a Professor. Dr. Li is an Associate Editor for IEEE Antenna and Wireless Propagation Letters. She is elected as 2023 IEEE APS Young Professional Ambassador. She is also a Member of the Education Committee within the IEEE Antennas and Propagation Society (AP-S), where she has served as the Final Judge for IEEE AP-S Student Design Contest. She won CST University Publication Award in 2013 and IEEE Women in NEMO for MAPE Award in 2020. Her current research interests include 5G mobile handset antennas, theory of characteristic mode, RFID antennas, antenna-user interactions, millimeter wave antennas, and microwave imaging. (Email: hui.li@dlut.edu.cn)

Jialu XU received the B.E. degree in electronic information science and technology from Liaoning University, Shenyang, China, in 2021. She is an M.S. candidate in information and communication engineering at Dalian University of Technology, Dalian, China. Her research interests include the application of characteristic mode theory in mobile antenna, and millimeter-wave antenna design

Yunze DIAO received the B.E. degree in electronic information engineering from Dalian University of Technology, Dalian, China, in 2020. He is M.S. candidate in information and communication engineering at Dalian University of Technology, Dalian, China. His current research interests include antenna-user interactions analysis, characteristic mode analysis of the mobile handset antenna and MIMO systems

Changfei ZHOU received the the B.S. and M.S. degrees in communication engineering from Harbin Institute of Technology, Harbin, China, in 2012 and 2014, and the Ph.D. degree from the University of Hong Kong, Hong Kong, China, in 2018. From 2018 to 2019, he was an antenna Engineer in LSCM research centre of Hong Kong. Since 2019, he has been a Lecture with the Dalian University of Technology. His current research interests include multiband and wideband antennas, RFID, and metasurface design
Received Date: 2022-07-29
Accepted Date: 2022-11-18

Available Online: 2023-01-14

Publish Date: 2022-11-05

Abstract

Abstract

Multiple antennas with low correlations are highly in demand in the mobile handsets for higher data rate. At the same time, the total pattern provided by the antennas should be as round as possible for reliable links. In this paper, by analysing the characteristic modes of the mobile chassis loaded by ultra-thin metal frames, a four-antenna system with a round total pattern is designed at 2.4 GHz. The gain variations are only 3.4 dB and 3.6 dB on two dominant planes. The isolations between antennas are above 15 dB, and the correlations are below 0.01, with intact ground plane and small ground clearance of 2 mm maintained. Afterwards, an eight-port antenna system is designed by taking advantage of the ground clearance and exciting modes with different phases. Low correlations of below 0.07 are obtained. The antenna system is fabricated, with the measured results agreeing well with the simulated ones.
- 5G mobile communication,
- Characteristic mode,
- Multiple-input-multiple-output (MIMO),
- Handset antenna,
- Radiation pattern

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References(28)

References

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