International Journal of RF and Microwave Computer-Aided Engineering

Volume 31, Issue 4 e22565

RESEARCH ARTICLE

An efficient tunable decoupling and matching method for simplifying compact dual-band mobile terminal antennas

Yi Chen,

Corresponding Author

Yi Chen

[email protected]

orcid.org/0000-0002-9753-7087

Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, Zhejiang, China

State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, Jiangsu, China

Correspondence

Yi Chen, Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, Zhejiang 315211, China.

Email: [email protected]

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Changzhou Hua,

Changzhou Hua

orcid.org/0000-0001-8863-9703

Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, Zhejiang, China

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Jun Xu,

Jun Xu

Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, Zhejiang, China

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Yunlong Lu,

Yunlong Lu

Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, Zhejiang, China

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Jifu Huang,

Jifu Huang

Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, Zhejiang, China

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Yi Chen,

Corresponding Author

Yi Chen

[email protected]

orcid.org/0000-0002-9753-7087

Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, Zhejiang, China

State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, Jiangsu, China

Correspondence

Yi Chen, Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, Zhejiang 315211, China.

Email: [email protected]

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Changzhou Hua,

Changzhou Hua

orcid.org/0000-0001-8863-9703

Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, Zhejiang, China

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Jun Xu,

Jun Xu

Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, Zhejiang, China

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Yunlong Lu,

Yunlong Lu

Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, Zhejiang, China

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Jifu Huang,

Jifu Huang

Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, Zhejiang, China

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First published: 04 February 2021

https://doi.org/10.1002/mmce.22565

Citations: 2

Funding information: National Key R&D Program of China, Grant/Award Number: 2018YFB1802100; National Natural Science Foundation of China, Grant/Award Numbers: 61631012, 61801252, 61971250, U1809203; Natural Science Foundation of Ningbo, Grant/Award Numbers: 2019A610071, 202003N4108, 202003N4109; State Key Laboratory of Millimeter Waves, Grant/Award Number: K202014; Zhejiang Provincial Natural Science Foundation of China, Grant/Award Numbers: LQ21F010005, LY19F010004, LY21F010002

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Abstract

An efficient tunable decoupling and matching method is proposed for simplifying compact mobile terminal antennas, that operates simultaneously in two independent bands. To enable carrier aggregation, the lower band in this design is tunable over the frequencies of interest for the traditional standards, while the upper band provides a fixed broad bandwidth to meet the bandwidth demands of 5G mobile terminal applications. Multi-element antenna systems, containing a simple antenna structure combined with tunable networks to realize dual-band decoupling and matching function, are systematically studied. The network structures are simplified to minimize the losses incurred in maintaining a good performance. To demonstrate the proposed approach, a two-element antenna system is developed in which the lower band can be tuned over the frequency range of 2.25 to 2.75 GHz, and the broad upper band can cover frequencies from 4.42 to 6.21 GHz. Good performance such as high total efficiency, low envelope correlation coefficient and stable radiation patterns, can be observed, thus, validating the effectiveness of the proposed method for simplifying the antenna structure.

Open Research

DATA AVAILABILITY STATEMENT

Data sharing is not applicable to this article as no new data were created or analyzed in this study.

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An efficient tunable decoupling and matching method for simplifying compact dual-band mobile terminal antennas

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An efficient tunable decoupling and matching method for simplifying compact dual-band mobile terminal antennas

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