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- 2018
不同工况对甚低频发射天线电性能 影响的分析方法
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Abstract:
为了研究甚低频发射天线在不同工况下的结构变形对其电性能的影响,提出了一种基于有限元法和矩量法的天线结构与电性能协同分析方法。首先在保证天线安全性系数满足要求的条件下,通过零阶优化算法对天线幕进行优化找形,生成一个理论上电性能较优的天线幕结构形态;然后在提取天线节点信息的基础上,通过一种文件格式转换的新方法将优化后的天线幕结构模型转换为可用于矩量法分析的电气模型;最后对该电气模型进行后处理,分析不同覆冰量和不同风速对天线电性能的影响。采用该方法分析了一个甚低频T形发射天线在不同工况下的电性能,分析结果表明,在各工况下天线的辐射电阻和损耗电阻均会发生变化,且天线辐射效率会发生不同程度的降低。所提出的方法对其他类型复杂结构线网形天线的结构与电性能协同分析具有一定的指导意义。
A cooperative analysis method of antenna structures and electrical performance based on the finite element method and the moment method is proposed to study the influence of structure deformation on the electrical performance of the very low frequency (VLF) transmitting antennas under different working conditions. Firstly, the antenna curtain is optimized by the zero order optimization algorithm under the condition that the safety factor of the antenna meets the requirements, and an antenna curtain structure form with theoretical better electrical performance is generated. Then, the antenna node information is extracted, and a new method of file format conversion is used to transform the optimized antenna curtain’s structure model to an electrical model for moment analysis. Finally, the electric model is processed to analyze the effects of different ice coverages and wind speeds on the electrical performance of the antenna. The method is used to analyze the electrical performance of a VLF T？？type transmitting antenna under different working conditions. It is found that the radiation resistance and loss resistance of the antenna change under different working conditions, and the radiation efficiency of the antenna has different degrees of reduction under ice and winding state. The proposed method has a certain guiding significance for the cooperative analysis of the structure and electrical performance for other types of complex structured wire mesh antennas
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