A study on the effect of snow on Localizer Antenna in snowy region Airport

为了研究积雪对雪区机场定位天线的影响，利用对数周期偶极子天线（LPDA）的比例模型进行了现场试验，并基于FDTD方法进行了分析。通过实验结果与分析结果的对比，验证了时域有限差分法模拟积雪LPDA的有效性。开发了一种新的模拟器，用于分析考虑雪和地面条件（雪深、雪介电特性、地面坡度、跑道坡度等）的定位系统航向特性，并经验证可用于青森机场的航向变化情况评估。

To investigate the effect of snow on Localizer Antenna in snowy region airport , the field experiments using a scale model LPDA(Log Periodic Dipole Antenna) and analysis based on FDTD method were conducted. From the comparison between the results of experiment and analysis, the effectiveness of FDTD simulation of LPDA covered with snow was confirmed. New simulator for analyzing the course characteristic of localizer system considering snow and ground conditions (snow depth, snow dielectric properties, ground slope, runway slope etc.) was developed and confirmed to be available for evaluating a course variation case in Aomori Airport.