CAJ | 학술논문

在同时存在随机误差和系统误差的情况下，提出了反射面天线平均功率方向图的计算方法。首先，分析面板加工误差以及框架安装误差，得出口径场随机相位误差的平均表达式。然后，考虑馈源的轴向偏焦问题，推导出系统误差存在时锥削照射相关函数的解析形式，进而得出了两种不同性质误差共同作用下的平均功率方向图。最后，以某65 m口径天线为对象，研究了随机误差和系统误差对其电性能的影响，并给出了参考建议。
재동시존재수궤오차화계통오차적정황하，제출료반사면천선평균공솔방향도적계산방법。수선，분석면판가공오차이급광가안장오차，득출구경장수궤상위오차적평균표체식。연후，고필궤원적축향편초문제，추도출계통오차존재시추삭조사상관함수적해석형식，진이득출료량충불동성질오차공동작용하적평균공솔방향도。최후，이모65 m구경천선위대상，연구료수궤오차화계통오차대기전성능적영향，병급출료삼고건의。
The method for evaluating the average power pattern of reflector antennas is proposed when they are subj ected to random errors and systematic errors.Firstly,the average expression for the random phase error of the aperture field is derived by analyzing the manufacturing errors of the single panel and misaligned errors of panel frames.Subsequently,the closed-form expression for the tapered illumination correlation function is derived by incorporating the axial defocus of the feed caused by systematic deformation.Then a novel mathematical model is developed to evaluate the average power pattern efficiently caused by the random error and systematic error.Finally,detailed parametric simulations are performed based on a reflector antenna with a 65 m diameter to investigate the overall effect of the random error and systematic error on the performance,and reference advices are given finally.