Wideband antenna pair and its applications for 5G metal frame mobile phones

Abstract

A wideband antenna pair used for 5G mobile phones is proposed in this paper. Both elements of the antenna pair consisting of an open slot and a coupled feeding line can cover the band of 3.3–6 GHz, and the isolation is larger than 10 dB. The ground clearance and the total size are 1.5 mm and 30 mm × 1.5 mm  × 7 mm, respectively. Using the antenna pair, four- and eight-element multiple-input–multiple-output (MIMO) antennas are constructed. The simulated results show that the proposed antenna pair can be used to construct MIMO antennas for 5G metal frame mobile phones. As an example, the four-element MIMO antenna is manufactured and tested. The measured results show that the four elements can cover the band of 3.3–6 GHz, and the n77, n78, n79, and 5 GHz WLAN bands are covered. At the working bands, the measured efficiencies and isolations are bigger than 46% and 11.4 dB, respectively.

KEYWORDS:

• Antenna pair
• 5G
• metal frame
• mobile phone

Disclosure statement

No potential conflict of interest was reported by the author(s).

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China under grant number 61771277 and the National Key Research and Development Program of China under grant number 2018YFB1801603.

Notes on contributors

Zheng Liu

Zheng Liu received the M.S. from Beijing University of Posts and Telecommunications in 2010. He is an engineer in China Academy of Information and Communications Technology. His main research interests include wireless telecommunication, antennas, propagation, and channel models. Since 2012, he has been working on standardization of OTA performance for wireless terminals in 3GPP/CTIA/CCSA.

Heng Liu

Heng Liu received the B.S. degree from Xidian University Xian, China, in 2002. She is currently working in China Academy of Information and Communications Technology and her main research interests include antennas, propagation, and electromagnetic compatibility.

Daiwei Huang

Daiwei Huang received the B.S. degree in electronic information science and technology from Xidian University Xian, China, in 2015. He is currently working toward the Ph.D. degree in Tsinghua University, Beijing, China. His research interests include mobile phone antenna and MIMO antennas. He served as a reviewer for the IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, IEEE ACCESS, the Journal of Electromagnetic Waves and Applications, International Journal of RF and Microwave Computer-Aided Engineering, the IET ELECTRONIC LETTERS, and IET Microwaves, Antennas & Propagation.

Zhengwei Du

Zhengwei Du was born in Sichuan Province, China, in August 1971. He received the B.Sc., M.Sc., and Ph.D. degrees in engineering from University of Electronic Science and Technology of China, Chengdu, China, in 1992, 1995, and 1998, respectively. Since 1998, he has been with Tsinghua University, Beijing, China, as a Postdoctoral Fellow (February 1998 to October 1999), Research Assistant (November 1999 to July 2000), Associate Professor (August 2000 to December 2006), and currently, Full Professor. His main research interests include antennas, propagation, and electromagnetic compatibility /electromagnetic interference (EMC/EMI).