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Frontiers of Information Technology & Electronic Engineering
ISSN 2095-9184 (print), ISSN 2095-9230 (online)
2022 Vol.23 No.10 P.1562-1567
Zero ground clearance dual antenna pair for metal-cased fifth-generation multiple input multiple output smartphone
Abstract: The fifth-generation (5G) era has already arrived and many applications are prospering. The multiple input multiple output (MIMO) system is the key to enhancing channel capacity for both the fourthgeneration (4G) wireless communication and 5G systems. For a smartphone, the most challenging task for antenna engineers is to accommodate the numerous 4G and 5G multi-port antennas while avoiding mutual coupling problems (Li Y et al., 2009, 2012; Hong, 2017; Sharawi et al., 2017). Therefore, implementing multiple antennas within a small space is a worthwhile topic to study, especially for antennas operating at the same frequency.
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1西安交通大学信息与通信工程学院，中国西安市，710049
2内蒙古大学电子信息工程学院，中国呼和浩特市，010021
3中国电子产业工程有限公司欧亚部，中国北京市，100846
4中国司法大数据研究院政企事业部，中国北京市，100043
摘要：本文首次提出零净空天线对，可适用于全金属外壳第五代移动通信技术（5G）多输入多输出（MIMO）智能终端。该天线对是金属边框上的T形槽结构，可以看作由两个对称的口对口开口槽构成。该结构存在两种工作于半波模式的极化正交特征模：对于同相电流环模式，两个开口槽相位相反，可以通过在缝隙处建立电位差来激励；对于槽模式，两个开口槽相位相同，可由一个对称馈电网络来激励。得益于T形槽位于侧边边框，不需要天线净空，非常适用于现代全面屏智能终端，终端后盖可采用金属材质，适用于全金属外壳终端。本文加工了一个Sub-6 GHz的四天线阵列来验证其可行性。在3.4–3.6GHz，两对天线对的隔离性均优于16.9 dB，任意两个天线之间的包络相关系数（ECC）均小于0.13，两种模式的总效率范围分别为43.5%–61.9%和40.5%–53.5%。
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DOI:
10.1631/FITEE.2200119
CLC number:
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On-line Access:
2022-10-24
Received:
2022-03-27
Revision Accepted:
2022-06-21
Crosschecked:
2022-10-24