A miniaturized mechanical antenna based on FEP/ THV unipolar electrets for extremely low frequency transmission  

作　　者：Yong Cui Ming Wu Zhaoyang Li Xiao Song Chen Wang Haiven Yuan Zhi-Xin Yang Junwen Zhong 

机构地区：[1]School of Automation Science and Electrical Engineering,Beihang University,Beijing 100191,China [2]Department of Electromechanical Engineering and Centre for Artificial Intelligence and Robotics,University of Macao,Macao,SAR 999078,China [3]School of Cyber Science and Technology,Beihang university,Beijing 100191,China [4]State Key Laboratory of Internet of Things for Smart City and Department of Electromechanical Engineering,University of Macao,Macao,SAR 999078,China

出　　处：《Microsystems & Nanoengineering》2022年第3期223-233,共11页微系统与纳米工程（英文）

基　　金：supported in part by the National Natural ScienceFoundation of China(51707006);the Natural Science Foundation of Bejing(4192033);the Science and Technology Development Fund,Macao SAR(Grant no.0018/2019/AKP,SKL-IOTSC(UM)-2021-2023,0059/2021/AF,0040/2021/A1)。

摘　　要：An electret-based mechanical antenna(EBMA),which can transmit extremely low frequency(ELF)electromagnetic signals,has the advantages of miniaturization and high transmitting efficiency,with great potential applications in air,underwater,and underground communications.To improve the charge density of the electret,which is a key factor in determining the radiation performance of an EBMA,this work proposes a fluorinated ethylene propylene/terpolymer of tetrafluoroethylene,hexafluoropropylene and vinylidene fluoride(FEP/THV)unipolar electret exhibiting negative polarity,reaching a total charge density up to-0.46 mC/m^(2) for each layer of electret.Long transmission distances can be achieved in sea water,soil,and air using a 3-layer-FEP/THV-based EBMA with a compact volume of 5×10^(-4) m^(3).As an application demonstration,binary ASili-coded ELF information of"BUAA"is successfully transmitted with a power consumption<5W.

关 键 词：ANTENNA PROPYLENE FEP 

分 类 号：TH11[机械工程—机械设计及理论]