分层海底上方低频电磁波传播特性研究  

Study on low-frequency electromagnetic wave propagation characteristics above stratified seafloor

作　　者：张斌 梅雪松 徐瑞 王宏磊[2] ZHANG Bin;MEI Xuesong;XU Rui;WANG Honglei(Laboratory of Low Frequency Electromagnetic Communication Technology with the 722 Research Institute,CSSC,Wuhan 430079,China;School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]中国船舶集团有限公司第七二二研究所低频电磁通信技术实验室,湖北武汉430079 [2]西北工业大学航海学院,陕西西安710072

出　　处：《华中科技大学学报（自然科学版）》2023年第11期114-119,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：低频电磁通信技术实验室基金资助项目(DPJJ-2019-02);国家自然科学基金资助项目(51809213)。

摘　　要：针对基于低频电磁波的海底预置无人作战系统的远程激活与通信问题,开展了海底附近低频电磁波的传播建模与性能分析研究.采用矢量磁位方法,构建了海水-沉积层-地壳-地幔分层介质中电磁波传播模型,获得了海底上方的电偶极子在海水中辐射的电磁场表达式.采用数值方法对积分形式的电磁场表达式进行求解,获得了电磁场在100 km范围内的衰减曲线.研究结果表明:通过海底介质传播的侧面波路径是海底上方收发节点间电磁波传播的主要贡献者;当收发天线对准时,水平电偶极子的辐射场强高于垂直电偶极子;沉积层的厚度和地壳的电导率对电磁波传播具有较大的影响,而海底介质其他因素影响较小.Aiming at the problem of remote activation and communication to the deep sea laying weapon system base on lowfrequency electromagnetic(EM)wave,the propagation modeling and performance analysis study of low-frequency EM waves near the seafloor was carried out.The EM wave propagation model in the seawater-sediment-crust-mantle layered media was constructed by using the vector magnetic potential method,and the expressions of the EM field radiated by the electric dipole above the seafloor were obtained.The expressions of the EM field with integrated form were solved by numerical methods,and the propagation curve of the EM wave in the range of 100 km was calculated.Research results show that the lateral wave propagating through the seafloor is the main contributor to the EM wave propagation between the transceiver nodes above the seafloor;the field intensity of the horizontal electric dipole is higher than that of the vertical electric dipole when the transceiver antennas are aligned;the thickness of the sediment layer and the conductivity of the crust have great influence on the EM wave propagation,while other factors of the seafloor have almost no influence.

关 键 词：分层海底介质 低频电磁波 侧面波 电偶极子 海底预置无人系统 

分 类 号：TN911[电子电信—通信与信息系统]