| 摘要: |
| 考虑了快速傅里叶变换（FFT）校准方法在各种配相状态的相关性情况，分析了移相
器幅相误差对FFT法校准误差的影响，得到了校准后的幅度误差和相位误差公式。给出了
仿真结果，对比仿真结果和理论分析，两者非常吻合。由该公式得出了影响该项误差的因素
除了和移相器幅相误差、校准网络的传输系数有关外，还和被校准通道的位置编号有关系。
解释了在大动态条件下，校准精度恶化的原因，并给出了解决该问题的方法。 |
| 关键词: 相控阵 FFT 幅相校准 幅相误差 |
| DOI：doi:10.3969/j.issn.1001-893x.2013.06.025 |
|
| 基金项目: |
|
| Impact of phase shift amplitude/phase errors on FFT-based calibrations |
| YANG Shun-ping |
| () |
| Abstract: |
| The impact of phase shifter amplitude/phase errors on the calibrations base
d on Fast Fourier Transform (FFT) is analyzed in consideration of the errors c
orrelation. A formula to calculate the errors is given. The analysis and si
mulation are compared, and the result agrees well. It is shown from the formula
that the errors relate to not only the amplitude/phase errors and calibration n
etwork′s S-parameter, but also the serial number of the channel in the FFT met
hod. The reason why the accuracy decreases under the condition of large dynamic r
ange can be found. And a new method w
hich can improve the calibration accuracy is proposed. |
| Key words: phased array FFT amplitude/phase calibration amplitude/phase error |
