A Review of Broadband Low-Cost and High-Gain Low-Terahertz Antennas for Wireless Communications Applications
A Review of Broadband Low-Cost and High-Gain Low-Terahertz Antennas for Wireless Communications Applications
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DOI：
10.1109/access.2020.2981393
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发表时间：
2020-03
期刊：
影响因子：
3.9
通讯作者：
R. Xu;S. Gao;B. S. Izquierdo;Chao Gu;P. Reynaert;Alexander Standaert;G. Gibbons;W. Bösch;M. Gadringer;Dong Li
中科院分区：
文献类型：
--
作者：
R. Xu;S. Gao;B. S. Izquierdo;Chao Gu;P. Reynaert;Alexander Standaert;G. Gibbons;W. Bösch;M. Gadringer;Dong Li
低太赫兹（Low-THz, 100ghz -1.0 THz）技术有望在第6代（6G）移动通信系统等未来几代无线系统中提供前所未有的数据速率。将毫米波载波频率提高到太赫兹是保证传输速率和信道容量的潜在解决方案。由于低太赫兹波在自由空间中的传输损耗大，设计高增益天线来补偿额外的路径损耗，并克服低太赫兹源的功率限制显得尤为迫切。近年来，随着增材制造（AM）和3D打印（3DP）技术的不断更新和进步，复杂结构的天线可以很容易地以高精度和低成本制造出来。第一部分介绍了宽带高增益亚毫米波天线和低太赫兹天线的最新研究进展及其制造技术。此外，还介绍了目前最先进的宽带和高增益天线的性能。对这些天线的比较进行了总结和讨论。第二部分介绍了一种基于FPC理论的300 GHz宽带高增益天线的全金属模型。提出的FPC天线非常适合使用AM技术制造，为新兴太赫兹应用提供了低成本，可靠的解决方案。
Low-terahertz (Low-THz, 100 GHz-1.0 THz) technology is expected to provide unprecedented data rates in future generations of wireless system such as the 6th generation (6G) mobile communication system. Increasing the carrier frequencies from millimeter wave to THz is a potential solution to guarantee the transmission rate and channel capacity. Due to the large transmission loss of Low-THz wave in free space, it is particularly urgent to design high-gain antennas to compensate the additional path loss, and to overcome the power limitation of Low-THz source. Recently, with the continuous updating and progress of additive manufacturing (AM) and 3D printing (3DP) technology, antennas with complicated structures can now be easily manufactured with high precision and low cost. In the first part, this paper demonstrates different approaches of recent development on wideband and high gain sub-millimeter-wave and Low-THz antennas as well as their fabrication technologies. In addition, the performances of the state-of-the-art wideband and high-gain antennas are presented. A comparison among these reported antennas is summarized and discussed. In the second part, one case study of a broadband high-gain antenna at 300 GHz is introduced, which is an all-metal model based on the Fabry–Perot cavity (FPC) theory. The proposed FPC antenna is very suitable for manufacturing using AM technology, which provides a low-cost, reliable solution for emerging THz applications.