大型甚低频伞形天线地损耗电阻的分析与计算  

Analysis and Calculation of Ground-Loss Resistance for Large VLF Umbrella Antenna

作　　者：代甘来 董颖辉[1] 康颖 DAI Gan-lai;DONG Ying-hui;KANG Ying(College of Electronic Engineering,Naval Univ.of Engineering,Wuhan Hubei 430033,China)

机构地区：[1]海军工程大学电子工程学院,湖北武汉430033

出　　处：《通信技术》2018年第11期2565-2569,共5页Communications Technology

摘　　要：针对岸基大型甚低频伞形发射天线,提出了任意顶线条件下地损耗电阻的理论计算方法,并导出了其近区磁场分布和磁场损耗电阻的计算公式。公式中增加了顶线电流对地损耗电阻的贡献,根据计算结果指出大型顶线产生的损耗不能忽略。该计算方法在计算大型甚低频发信天线磁场分布时,准确度与电磁场数值计算方法一致,且速度更快,为工程设计提供了一种简单、准确、便捷的地损耗电阻计算方法。Aiming at the large-scale shore-based VLF umbrella transmitting antennas, the theoretical calculation method for ground-loss resistance under arbitrary top-line conditions is proposed, and the calculation formulas for the near-field magnetic-field distribution and loss resistance derived. The contribution of the top line current to the ground loss resistance is added to the formulas. The calculation results indicate that the loss caused by the large top line cannot be ignored. When calculating the magnetic- field distribution of large VHF transmitting antennas, the accuracy is consistent with the electromagnetic field numerical calculation method and the speed is faster. This provides a simple, accurate and convenient method for calculating the loss resistance of engineering design.

关 键 词：甚低频 伞形天线 地损耗电阻 磁场分布 

分 类 号：TN822.1[电子电信—信息与通信工程]