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基于高速數(shù)字相關(guān)器的太赫茲干涉儀系統(tǒng)研究

基于高速數(shù)字相關(guān)器的太赫茲干涉儀系統(tǒng)研究[J]. 電子與信息學(xué)報(bào), 2016, 38(4): 964-969. doi: 10.11999/JEIT150841
引用本文: 基于高速數(shù)字相關(guān)器的太赫茲干涉儀系統(tǒng)研究[J]. 電子與信息學(xué)報(bào), 2016, 38(4): 964-969. doi: 10.11999/JEIT150841
Investigation on THz Interferometer System Based onHigh Speed Digital Correlator[J]. Journal of Electronics & 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 & Information Technology, 2016, 38(4): 964-969. doi: 10.11999/JEIT150841

基于高速數(shù)字相關(guān)器的太赫茲干涉儀系統(tǒng)研究

doi: 10.11999/JEIT150841 cstr: 32379.14.JEIT150841

Investigation on THz Interferometer System Based onHigh Speed Digital Correlator

  • 摘要: 干涉儀利用通道間的相關(guān)運(yùn)算進(jìn)行測(cè)量,是干涉式成像的基本單元。太赫茲成像在安全檢查、軍事偵查等方面有著廣泛的應(yīng)用前景。將干涉成像測(cè)量引入太赫茲領(lǐng)域后,為解決相關(guān)運(yùn)算中高速信號(hào)的相位同步問(wèn)題,該文提出基于低速FPGA控制的交叉同步方案,用低硬件代價(jià)解決高速采樣信號(hào)的相位同步問(wèn)題,并完成了一套多通道高速數(shù)字相關(guān)系統(tǒng)。系統(tǒng)的最高采樣速率為5 GHz, ADC有效位數(shù)大于等于6位,相關(guān)器積分時(shí)間可調(diào)。最后,利用該數(shù)字相關(guān)器和相應(yīng)的太赫茲微波元器件搭建了中心頻率為0.44 THz的干涉儀,并得到了清晰的干涉條紋,其線性相位誤差小于2 。該研究為今后設(shè)計(jì)太赫茲干涉成像儀提供了基本單元。
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出版歷程
  • 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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