Low-frequency metamaterial antenna based on magnetic field coupling effect  

作　　者：Zilun ZENG Jingqi WU Chenxi ZHANG Liwei WANG Zidong ZHANG Yunsheng GUO Jianchun XU Ke BI 

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications,School of Science,Beijing University of Posts and Telecommunications,Beijing,100876,China [2]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education),Shandong University,Jinan,250061,China [3]School of Electronic Information Engineering,Inner Mongolia University,Hohhot,010021,China

出　　处：《Science China(Technological Sciences)》2025年第4期82-93,共12页中国科学(技术科学英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.U2241243,52102061,52372101);Beijing Natural Science Foundation(Grant No.JQ22010);the Fundamental Research Funds for the Central Universities(Grant No.2023ZCJH03);the Teaching Reform Projects at BUPT(Grant No.2024Y010);the Fund of State Key Laboratory of IPOC(BUPT)(Grant No.IPOC2024ZT13)。

摘　　要：Low-frequency(LF)electromagnetic waves have high penetration and low attenuation characteristics in media,making them essential for cross-media communications.In LF communication systems,the loop antenna commonly functions as a receiver for detecting weak signals.However,traditional LF loop antennas typically require large structures to achieve high radiation efficiency,which poses challenges for portability and long-distance transmission.Here,a magnetic resonant coupling metamaterial(MRCM)antenna with high radiation capacity,frequency tunability,direction adjustability,and compact form is demonstrated.To elucidate its radiation mechanism and frequency modulation capabilities,the equivalent circuit model and electromagnetic simulations are carried out.Compared with conventional loop antennas,the MRCM antennas can realize the radiation magnetic flux density seven times and extend the effective magnetic transmission distance by three times.Besides,the MRCM antennas allow for adjustable radiation direction and operating frequency,enhancing its versatility in different application scenarios.This metamaterial antenna design allows a pocket-sized antenna to achieve an effective communication range of 180 m,presenting a promising solution for improving communication capabilities in changing environments such as underwater and underground settings.

关 键 词：low frequency communication METAMATERIAL magnetic resonant coupling wireless communication 

分 类 号：TN82[电子电信—信息与通信工程] TN820