Low-Profile Independently- and Concurrently-Tunable Quad-Band Antenna for Single Chain Sub-6GHz 5G New Radio Applications
Low-Profile Independently- and Concurrently-Tunable Quad-Band Antenna for Single Chain Sub-6GHz 5G New Radio Applications
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DOI：
10.1109/access.2019.2960096
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发表时间：
2019-12
期刊：
影响因子：
3.9
通讯作者：
S. Asif;M. R. Anbiyaei;K. L. Ford;Timothy O’Farrell;R. Langley
中科院分区：
文献类型：
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作者：
S. Asif;M. R. Anbiyaei;K. L. Ford;Timothy O’Farrell;R. Langley
本文提出了一种用于5G新无线电(NR)可调谐、并发、四频单链无线电接收机的四频捷变天线，每个频段具有独立和并发的频率可调性。更具体地说，该天线由四个平面缝隙组成，这些缝隙蚀刻在地平面上，并通过单条微带馈线馈电，没有任何阻抗匹配网络。该结构经过优化，以最大限度地隔离各个槽及其各自的谐振频率。此外，还提出了一种新颖的高次谐波抑制方法，该方法通过在缝隙天线中创建虚拟短路来控制电流分布，从而使天线实现更宽的调谐范围。数值模拟通过实验实现和测量进行了验证，观察到了良好的一致性。这四个槽围绕830 MHz、1.8GHz、2.4GHz和3.4GHz频段谐振，这些频段是独立调谐的(在每个槽中使用变容二极管)，分别实现约%、66%、27%和33%的调谐范围。更重要的是，连续的四个频段覆盖了从0.6到3.6 GHz的总频率调谐，即调谐范围约为143%。最后，进行了远场测量，并在空中测试床(四频无线电接收机)中对天线进行了评估，该测试平台测量了各个信道的误差向量幅度性能。观察到良好的性能，确认了四个频段之间可以接受的隔离性能。本文中报告的数据可从https://doi.org/10.15131/shef.data.11219000.v1.的谢菲尔德大学研究数据目录和储存库获得
This paper presents a quad-band frequency agile antenna, with independent and concurrent frequency tunability in each band, for a tunable, concurrent, quad-band single chain radio receiver for 5G New Radio (NR). More specifically, the antenna comprises of four planar slots etched in a ground plane and fed through a single microstrip feedline, without any impedance matching network. The structure is optimized to maximize isolation between the individual slots and their respective resonant frequencies. Furthermore, a novel high order harmonic suppression method is demonstrated, which controls the current distribution via creating a fictitious short circuit in the slot antenna–enabling the antenna to achieve a much wider tuning range. Numerical simulations are verified using experimental implementation and measurements, with good agreement observed. The four slots resonate around the 830 MHz, 1.8 GHz, 2.4 GHz and 3.4 GHz frequency bands, which are independently tuned (using a varactor diode in each slot) to achieve tuning ranges of approximately 64%, 66%, 27% and 33%, respectively. More importantly, the contiguous four bands covers a total frequency tuning from 0.6 to 3.6 GHz i.e. a tuning range of approximately 143%. Finally, far-field measurements are performed and the antenna is evaluated in over-the-air testbed (quad-band radio receiver), which measures the Error Vector Magnitude performance for the individual channels. Good performance is observed, confirming acceptable isolation performance between the four bands. The data reported in this paper is available, from ORDA-The University of Sheffield Research Data Catalogue and Repository, at https://doi.org/10.15131/shef.data.11219000.v1.