随机误差对超低副瓣天线平面近场测量的影响

The effect of random errors on planar near-field measurements with ultra-low sidelobe antennas

导出了平面近场测量中近场幅相随机误差所引起的误差谱的解析表达式。利用计算机模拟和统计平均的方法研究了近场幅相随机误差对超低副瓣天线平面近场测量结果的影响 ,并给出不同口径尺寸的超低副瓣天线的平面近场测量 ,为保证- 5 5 d B副瓣± 5 d B的测试精度 。

The analytical expressions of the error spectra caused by random errors in the measurement of amplitude and phase of the near field in planar near field measurements are presented. The effect of random errors in the measurement of amplitude and phase of the near field on planar near field measurements with ultra low sidelobe antennas is studied by means of computer simulation and statistical average, and the maximum permissible varying intervals of random errors in the measurement of amplitude and phase of the near field for planar near field measurements with ultra low sidelobe antennas are given in order to ensure the measurement accuracy of ±5dB for -55dB sidelobe with different aperture size .