船舱内无线电波的传输特性分析与仿真

Simulation and Analysis of Radio Wave Propagation Characteristic in Cabin

针对船舱内狭小的过道空间,利用马卡梯里分析法建立矩形通道和弯曲通道的无线电波传输模型,并利用Matlab仿真分析船舱通道截面积尺寸和电磁波频率对船舱内电磁场强分布、电磁波衰减系数的影响,分析弯曲通道曲率半径、电磁波频率对电磁波衰减系数的影响。仿真结果表明:截面积越大、电磁波频率越高,电磁波幅值衰减越小、传输的距离越远,但频率越高多径效应越明显;弯道曲率半径越小,电磁波衰减率随着频率增加而衰减的越快;在高度大于宽度的通道中,使用垂直极化波天线能够传输更远的距离。最后对船舱通道空间内电磁波的传播总的衰减率进行实验测试与数据处理,得出船舱内无线数据传输的最佳频率为910 MHz。

Two models were developed to simulate radio wave transmission in the cabin by Maca ladder. Software Matlab was used to perform the simulation investigation of channel cross-sectional area of the cab-in and model order on electromagnetic wave cutoff frequency and attenuation coefficient,and analyses the effects of electromagnetic wave frequency and bending radius of curvature of the channel on electromagnetic wave amplitude attenuation coefficient.Simulation results show that larger cross-sectional area of the chan-nel and smaller model orders will lead to smaller amplitude attenuation of electromagnetic wave and smaller cutoff frequency.The smaller radius of curvature of the channel will cause the faster the electromagnetic wave attenuation.And finally,the best wireless transmission frequency we got in the Cabin is 910 MHz by the simulation of total decay rate and field test.