目视遮蔽物对航向信号影响的研究  

Research on the Effect of End-around Taxiway Screen on Localizer Signal

作　　者：夏田奇 任泓润 赵庆田 沈刚 郭雪冰 XIA Tianqi;REN Hongrun;ZHAO Qingtian;SHEN Gang;GUO Xuebing(Beijing Jinghang’an Airport Engineering Co.LTD,Beijing 100176,China;CAST Zhongyu(Beijing)New Technology Development Co.LTD,Beijing 100028,China)

机构地区：[1]北京京航安机场工程有限公司,北京100176 [2]航科院中宇(北京)新技术发展有限公司,北京100028

出　　处：《民航学报》2021年第6期48-53,共6页Journal of Civil Aviation

摘　　要：基于Indra公司NORMRC 7000B系列仪表着陆系统(instrument ianding system,ILS)设备手册,对20振子航向信标台天线阵建立数学模型,仿真分析航向天线阵的水平辐射信号与方向性图,验证了模型的准确性;然后对目视遮蔽物(end-around taxiway screen,EAT screen)进行建模,分析了目视遮蔽物对航向信号的干扰类型,对接收信号调制度差(difference in the depth of modulation,DDM)进行仿真,对比分析目视遮蔽物对航向信号的航道结构影响程度。结果表明设置目视遮蔽物时对航向信号的影响较小,同时对目视遮蔽物的设置与应用提供了参考依据。Based on Indra.s NORMRC 7000 B series instrument landing system(ILS)equipment manual,a mathematical model of the antenna array of the 20-Element Localizer Antenna System is established.The horizontal radiation signal and pattern of the antenna array are simulated and analyzed to verify the accuracy of the model.Then the end-around taxiway screen is modeled and the type of interference of the end-around taxiway screen to the localizer is analyzed.Finally,the received signal.s difference in the depth of modulation(DDM)is simulated,and the influence of the end-around taxiway screen on the course structure of the localizer signal is compared and analyzed.The results show that the setting of end-around taxiway screen has little effect on the localizer signal,and they also provide reference for the setting and application of end-around taxiway screen.

关 键 词：目视遮蔽物 仪表着陆系统 调制度差 航向天线阵 

分 类 号：TN961[电子电信—信号与信息处理]