摘要
水下信息实时传输的需求与日俱增,水声通信和光通信等传统通信手段在传输安全性与稳定性方面具有先天难以弥补的劣势,且在传输速率方面难以形成突破,因此亟待对新技术进行研究。为解决此问题,近年一些学者提出一种新机理、新材料和新工艺的小型化天线,有望实现低频天线在尺寸和性能上的跨越,实现水下通信技术的变革。该文对此类声波激励小型化天线进行研究。首先阐述并建立了天线辐射机理及理论模型,分析了不同材料参数对天线性能的影响;然后根据模型参数设计加工了基于铌酸锂(LiNbO_(3))晶体的压电型声波激励天线样机,实验结果表明在40.83 kHz谐振频率处,与同尺寸单极子天线相比,其接收电压峰值为后者的22倍,辐射效率为400多倍;最后对天线进行了方位测试和辐射效率计算。上述结果表明:基于压电晶体的声波激励天线技术在低频段小型化、机动化水下无线通信设备的应用中具有巨大潜力。
The demand for real-time communication of underwater information is rising by the day.Traditional communication technologies,such as underwater acoustic communication and optical communication,have inherent drawbacks in terms of transmission security and stability,and it is difficult to build a transmission rate breakthrough.As a result,it is critical to investigate new technologies.To address this issue,some researchers have proposed a miniaturized antenna with new mechanisms,materials,and technology,which is expected to realize a leap in size and performance of low-frequency antennas and transform underwater communication technology.This type of acoustically excited miniaturized antenna is studied in this paper.First,the radiation mechanism and theoretical model of the antenna are explained and established,and the effect of various material factors on the antenna's performance is investigated.The model parameters are then used to develop and manufacture a piezoelectric acoustically excited antenna prototype based on lithium niobate(LiNbO_(3))crystal.The experimental findings reveal that at the resonance frequency of 40.83 kHz,the peak receiving voltage is 22 times that of the monopole antenna,and the radiation efficiency is more than 400 times that of the latter.Finally,the antenna's pattern test and radiation efficiency calculation are performed.The results suggest that acoustically excited antenna technology based on piezoelectric crystals has a lot of potential for low-frequency miniaturized and motorized underwater wireless communication equipment.
作者
扶逸凡
徐国凯
朱祥维
肖绍球
张靖浩
钟玖平
李婉清
李君儒
王宇航
王子业
李杜
FU Yifan;XU Guokai;ZHU Xiangwei;XIAO Shaoqiu;ZHANG Jinghao;ZHONG Jiuping;LI Wanqing;LI Junru;WANG Yuhang;WANG Ziye;LI Du(Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,China;School of Electronics and Communication Engineering,Sun Yat-sen University,Shenzhen,518107,China;School of System Science and Engineering,Sun Yat-sen University,Guangzhou 510006,China;School of Electronics and Information Technology,Sun Yat-sen University,Guangzhou 510006,China;School of Materials,Sun Yat-sen University,Shenzhen 518107,China;Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,China)
出处
《电子与信息学报》
EI
CSCD
北大核心
2023年第11期3935-3944,共10页
Journal of Electronics & Information Technology
基金
国家重点研发计划(2021YFA0716500)
南方海洋科学与工程广东省实验室(珠海)资助项目(SML2021SP408)
深圳市科创委基础研究重点项目(2020N259)
深圳市科技计划(GXWD20201231165807008,20200830225317001)。
关键词
水下通信
声波激励天线
压电晶体
小型化天线
Underwater communication
Acoustically excited antenna
Piezoelectric crystal
Miniaturized antenna
