Research on Method of Improving Scanning Beam Pointing Accuracy in UAV Microwave Landing Navigation System
HAN Kun
ZHAO Yinghui
WU Dewei
Abstract：Microwave landing navigation system is used for UAV reducing the number of phased array scan-ning antenna to improve its maneuverability,by so doing,this makes scanning beam wide and main -beam's symmetry worse.The phenomenon can reduce the scanning beam pointing accuracy and robustness of original phasing methods,and consequently weaken the navigation ability.Aimed at the problem,a new method of the combined circle??phase method with the improved genetic algorithm is proposed to improve the scanning beam pointing accuracy.At every scanning pointing,whenever a circle??phase constant is add-ed,the genetic algorithm is improved to optimize,determine the final phase shifters'input values and quantization manners,and overcome the shortage of circle??phase method and basic genetic algorithm in u-sing alone.The simulation shows that the beam pointing accuracy produced by the combination method is superior to the beam pointing accuracy produced by random phasing methods and basic genetic algorithm.
Keywords：Quantitative phase errorcircle??phase methodimproved genetic algorithmbeam pointing ac-curacy
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 15-19 )