摘要
多径效应在机载天线的外场测试中会严重影响测试精度。针对该问题,提出了一种能够消除多径误差且简单易行的测试方法。该方法考虑多径信号的产生机理和矢量叠加原理,对直达和反射信号的组合进行测试,通过数据处理得出直达波信号强度,用于天线增益和方向图计算。利用该方法对机载VHF/UHF天线开展了外场测试,测试结果与仿真曲线吻合良好,证明了该方法的有效性。该测试方法可用于机载航电系统的总体设计与试验验证工作。
The multipath effect seriously affects the measurement precision in the out-field test of airborne antenna.To solve this problem,a straightforward testing method of eliminating the multipath error is proposed.According to the mechanism of the multipath signal and the principle of vector addition,the combined signals of direct path wave and the reflected wave are measured repeatedly.The signal intensity of the direct wave is got by the data processing,which is used to calculate the antenna gain and pattern.Using this method,the aircraft VHF/UHF antenna is tested in the out-field.The good agreement between the measured data and the simulated results proves the validity of this method.This method can be used in the overall design and experimental study of airborne avionics system.
作者
青滔
QING Tao(Southwest China Institute of Electronic Technology,Chengdu 610036,China)
出处
《电讯技术》
北大核心
2020年第2期239-244,共6页
Telecommunication Engineering
关键词
航空电子系统
机载天线
外场测试
多径效应
avionics system
airborne antenna
out-field test
multipath effect
