海上蒸发波导电波传播特性预测  

Prediction of Radio Propagation Characteristics on Evaporation Duct over Sea

作　　者：金慧琴[1] 王正磊[1] 宋斌斌[1] 

机构地区：[1]海军航空工程学院,山东烟台264001

出　　处：《信息通信》2017年第11期1-3,共3页Information & Communications

摘　　要：电磁环境计算是战场电磁环境预测仿真系统的核心,海面上温度的逆增和湿度随高度增加的剧烈递减,使得蒸发波导出现概率较高且持续时间较长。因此,海上蒸发波导具有较高的研究价值,给出一种基于PE模型的电场强度计算方法,引入修正折射指数描述不均匀大气结构,仿真分析了蒸发波导对电波传播的影响,仿真分析表明相比于标准大气结构的传播损耗,蒸发波导对电波传播产生了陷获作用,电波受大气折射,在波导层向下偏转,传播轨迹弯向地面,电波在波导层中传播损耗明显减小,形成超视距传播。The core of battlefield electromagnetic environment is electromagnetic environment calculation. Temperature inver-sion on the sea surface and humidity sharp decline can cause higher probability of occurrence and longer duration of evaporation duct. Accordingly evaporation duct over sea has high research value. The calculation methods of electric field intensity are given and modified refractive index describing inhomogeneous atmospheric structure is introduced. Simulation analysis for the impact of evaporation duct on radio propagation is conducted. Simulation analysis shows that evaporation duct has trapping effect for radio propagation comparing with the propagation loss of standard atmospheric structure. Downward deflection of Radio wave has caused and propagation path is bended to the ground due to atmospheric refraction. So Propagation loss in the waveguide layer is decreased significantly and over the horizon propagation is formed.

关 键 词：电磁环境 蒸发波导 电波传播 

分 类 号：E917[军事]