| DME系统二次传播路径干涉效应分析 |
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| 引用本文： | 栗秀清,沈永春.DME系统二次传播路径干涉效应分析[J].现代导航,2020,11(4):263-267. |
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| 作者姓名： | 栗秀清 沈永春 |
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| 作者单位： | 天津七六四通信导航技术有限公司,天津 300210 |
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| 摘 要： | DME 是国际民航组织推荐的近程无线电导航系统，在实际使用过程中，某些覆盖空域可能会出现测距误差超差的情况，经过分析验证，排除无限电干扰因素，主要还是地形反射形成的信号“零区”效应引起的。本文主要通过对 DME 系统二次传播路径干涉效应的分析，对 DME 天线辐射场型的“零区”分布情况进行了分析仿真，为 DME 地面信标的场地选择和天线架设高度提供理论参考。
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| 关 键 词： | DME 二次传播路径干涉 零区 |
Interference Effect Analysis of Secondary Propagation Path of DME System |
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| Authors: | LI Xiuqing SHEN Yongchun |
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| Abstract: | DME is a short-range radio navigation system stipulated by ICAO. In actual use, ranging error may occur in some coverage airspace. After analysis and verification, the factor of radio interference is excluded, mainly due to the zero-zone caused by terrain reflection. This paper mainly analyzed and simulated the distribution of the zero-zone of the DME antenna radiation pattern through the analysis of the two-path interference effect of the DME system. It provides theoretical reference for the selection of DME ground beacon and the height determination of antenna erection. |
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