高教机天线布局影响通讯距离研究与改进

Research and Improvement on Layout of Advanced Trainer's Antenna that Affecting Communication Distance

某型高级教练机在试飞中,出现空地通讯距离不满足战技指标要求的问题。经过分析发现,由于超短波电台天线作为单极天线,其安装布局未满足天线本身要求,即接地面尺寸过小、近场区环境复杂等,导致天线辐射性能受到影响。本文对天线阻抗和方向性系数进行了研究分析,并根据飞机情况制定相应的改进方案。

During flight test of certain type of advanced trainer, the problem that the air -to-ground communication distance being not able to meet the requirement of tactical and technical index occurred. After through analysis, we found that the ultrashort wave radio antenna as single pole antenna, its installation layout did not meet requirement of the antenna itself, i.e. its distance to ground is too short, with the complicated environment around the airfield and so on, which result in the radiation performance of the antenna being affected. The paper conducts the research and analysis on antenna impedance and directional eoefficient, and works out the corresponding improvement program in accordance with the aircraft status.