基于抛物方程的海上电磁环境场强计算与应用

Calculation and application of maritime electromagnetic environment field intensity based on parabolic equation

海洋在国家经济发展和国防建设中起着重要作用,电子设备在海洋开发中不断应用,海上电磁环境预测需求日渐迫切。海面大气波导对电波传播和电子信息系统的运行影响显著。在此选用抛物方程模型离散混合傅里叶变换法求解波导环境下的电波传播损耗,提出基于传播损耗与辐射源参数的电场强度计算方法,预测电磁场空间分布,从而根据电磁环境国军标给出对人员、设备的电磁辐射危害区域,为准确预测海上电磁环境分布,分析电磁辐射对电子信息系统的影响提供了方法。

Since the demand of maritime electromagnetic environment prediction is increasingly urgent,and the maritime atmospheric duct has prominent influence on radio-wave propagation and operation of electronic information system,the discrete mixed Fourier transform（DMFT）method of parabolic equation model is selected to solve the radio-wave propagation loss in atmospheric duct environment. The electric field intensity computing method based on the propagation loss and radiation source parameter is put forward to predict the electromagnetic field spatial distribution. According to the calculated result and the electromagnetic environment national military standards,the electromagnetic radiation hazard area for staff and equipments is given,which provides a method to accurately predict the maritime electromagnetic environment distribution and analyze the influence of electromagnetic radiation on electronic information system.