高精度准光天线装配校准测量技术研究

Research on assembly calibration and measurement technologyof high-precision quasi-optical antenna

高精度准光天线尺寸小、部件多、结构紧凑且复杂,工作频率达到数百赫兹以上,这些特点对天线的装配校准和测量提出了高精度、高效率和高可靠的需求。基于此,针对天线装配校准过程提出了一种统一基准定位装配技术,实现了天线反射镜、馈源喇叭、频选和线栅等部件的高精度可靠装配,并降低了最终装配累积误差的影响,同时针对测量过程,提出了一种基于激光测量和数模比对技术建立虚拟基准用于高精度天线多部件形状位姿等装配精度测量的新技术。解决了目前高精度准光天线各部件装配精度测量的难题,提高了准光天线装配校准测量的精度和效率,对后续相关类型天线的高精度装配校准和测量具有重要的指导意义。

The high-precision quasi-optical antenna is small,compact and complex,and its working frequency reaches hundreds of hertz.These characteristics put forward high-precision,high-reliability requirements for the assembly,calibration and measurement of the antenna.Based on this,this paper proposes a unified reference positioning assembly technology for the antenna assembly calibration process,which realizes the high-precision and reliable assembly of the antenna reflector,feed horn,frequency selection and wire grid and reduces the impact of the final assembly cumulative error at the same time,for the measurement process,a new technology based on laser measurement and digital-analog comparision technology to establish a virtual datum for high-precision antenna multi-component shape and other assembly accuracy measurement is proposed,which solves the current high-precision quasi-optical antenna components.The problem of assembly accuracy measurement.The research results of this paper not only improve the accuracy and efficiency of the quasi-optical antenna assembly calibration measurement,but also have important guiding significance for the follow-up high-precision assembly calibration and measurement of related types of antenna.