蒸发波导条件下海上超视距通信距离研究

Research on Maritime Transhorizon Communication Distance Based on Evaporation Duct

大气波导的存在对海上电磁波传播产生严重影响,蒸发波导因发生概率、波导高度等特殊性对舰载微波通信装备影响尤为突出。研究了蒸发波导特征及电磁波形成波导传播条件。利用抛物线方程分布傅里叶算法计算蒸发波导条件下电磁波传播损耗,提出了基于蒸发波导条件下海上超视距通信距离估算方法及计算流程。仿真分析不同波导高度电磁波传播损耗,验证了该方法的可行性。仿真结果表明蒸发波导条件下,可实现海上微波超视距通信,能够定量估算有效通信距离,通信距离可达上百公里。研究结论对指导舰载微波频段的通信应用具有重要意义。

The presence of atmospheric duck has a serious impact on the maritime electromagnetic wave prop-agation,especially the impact of particularities of evaporation duct,such as the probability of occurrence andduct height,on ship-borne microwave communication equipment is obvious. In this paper,the particularitiesof evaporation duct and the conditions of generating duct propagation by electromagnetic wave are studied,theloss of electromagnetic wave under evaporation duct is calculated with the Fourier algorithm parabolic equa-tion,the estimation method and calculation flow to maritime transhorizon communication based on evaporationduct are proposed,the losses of electromagnetic wave in different duct heights are analyzed by simulation a-nalysis to verify the feasibility of the method. Simulation results show that,under evaporation duct,maritimetranshorizon microwave communication and quantitative estimation of effective communication range can be a-chieved,the communication distance is up to hundreds of kilometers. The conclusions have great significancefor instructing the application of ship-borne microwave communication system.