超低频水下发射天线的可行性研究  

Feasibility Research of Underwater SLF Transmitting Antennas

作　　者：闫晓伟 

机构地区：[1]解放军92060部队

出　　处：《舰船电子工程》2013年第1期76-78,103,共4页Ship Electronic Engineering

摘　　要：超低频电磁波从海水传入大气时,在海面处发生反射和透射,穿透海面的能量集中在界面附近,以侧面波沿两种介质分界面传播的。通过对比海面附近单位水平电偶极子在水平距离100km和5000km及100m深度的海水中产生的电磁场和美国一个超长波台的数据,由计算结果知采用中场水下发射天线对100m深度的水下设备进行通信几乎是不可能实现的。但在近场上,同样采用的发射电流,仅需很短的天线,可以大大降低超低频发射系统的成本,而且目标隐蔽,生存能力强和灵活机动。Reflection and refraction occur between air and seawater boundary. Between the boundary the will waves propagate as Later al electromagnetic waves. Comparison has been made between calculation of E fields of unit horizontal electric dipole just below the sea surface（p= 100km/5000km and z= 100m）with one SLF data of the US. The result is that in the intermediate field, it is hardly realized with underwater antenna below 100m. But in the near field, only a short antenna is enough as the same transmitting current, which will greatly reduce the cost of SLF transmitting system. The underwater antenna is difficult to be found. It has excellent viability and flexibility.

关 键 词：发射天线 超低频 侧面波 近场 中场 

分 类 号：TM151[电气工程—电工理论与新技术]