仪表着陆系统下滑天线辐射特性仿真研究

Research of Glide Slope Antenna Radiation Characteristics of Instrument Landing System

下滑天线是仪表着陆系统的重要组成部分,其辐射的电磁信号提供着陆飞机相对跑道入口的下滑道指引。下滑天线失效时,将不能提供下滑道,飞机着陆过程将由精密进近变为非精密进近。下滑天线辐射特性是下滑道仿真研究的重点,本文对下滑天线进行建模,求解其电流分布和方向函数,进而运用Matlab仿真其远区辐射场(三维方向图)。

Glide slope antenna is an important constituent of Instrument Landing System. lts electromagnetic radiation signals offer Glide Path guidance for landing aircraft relative to the threshold. Once the antenna fails, it will not be able to provide the glide path and aircraft landing will transfer from precision approach to non-precision approach. Glide slope antenna radiation characteristics is the key to the glide path simulation research.This paper builds a model of Glide slope antenna, calculate its current distribution and direction function, and then uses Matlab to simulate its far region radiation field （three-dimensional direction chart）.