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基于高速数字相关器的太赫兹干涉仪系统研究

基于高速数字相关器的太赫兹干涉仪系统研究[J]. 电子与信息学报, 2016, 38(4): 964-969. doi: 10.11999/JEIT150841
引用本文: 基于高速数字相关器的太赫兹干涉仪系统研究[J]. 电子与信息学报, 2016, 38(4): 964-969. doi: 10.11999/JEIT150841
Investigation on THz Interferometer System Based onHigh Speed Digital Correlator[J]. Journal of Electronics and Information Technology, 2016, 38(4): 964-969. doi: 10.11999/JEIT150841
Citation: Investigation on THz Interferometer System Based onHigh Speed Digital Correlator[J]. Journal of Electronics and Information Technology, 2016, 38(4): 964-969. doi: 10.11999/JEIT150841

基于高速数字相关器的太赫兹干涉仪系统研究

doi: 10.11999/JEIT150841

Investigation on THz Interferometer System Based onHigh Speed Digital Correlator

  • 摘要: 干涉仪利用通道间的相关运算进行测量,是干涉式成像的基本单元。太赫兹成像在安全检查、军事侦查等方面有着广泛的应用前景。将干涉成像测量引入太赫兹领域后,为解决相关运算中高速信号的相位同步问题,该文提出基于低速FPGA控制的交叉同步方案,用低硬件代价解决高速采样信号的相位同步问题,并完成了一套多通道高速数字相关系统。系统的最高采样速率为5 GHz, ADC有效位数大于等于6位,相关器积分时间可调。最后,利用该数字相关器和相应的太赫兹微波元器件搭建了中心频率为0.44 THz的干涉仪,并得到了清晰的干涉条纹,其线性相位误差小于2 。该研究为今后设计太赫兹干涉成像仪提供了基本单元。
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出版历程
  • 收稿日期:  2015-07-13
  • 修回日期:  2015-11-13
  • 刊出日期:  2016-04-19

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