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所有,我正在尝试使用SMA连接器在PNA N5227A上进行未知的校准。
我想知道这个校准有什么限制。 我有一个未知的通过,没有那么好的匹配(谢谢你, 以上来自于谷歌翻译 以下为原文 All, I am attempting an unknown thru calibration on a PNA N5227A with SMA connectors. I am wondering what the limitations are on this calibration. I have a unknown thru that has not-so good match (<- 10dB) from 10 MHz to 16 GHz. My loss is about 23 dB at 16 GHz. Whenever i do the calibration, i get an unrealistic post-calibration measurement (i.e. S11 < -30 dB) and S21 essentially open (-40dB) across this particular frequency range. I am wondering if i have to use a better matched thru and/or less lossy thru. The documentation stipulates that as long as you dont have 40 dB loss including the cables this method should work. I am dumbfounded as to what could be going on. I can post some of the plots if this helps answer the question. thank You, |
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1个回答
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什么FW?
您使用什么Calkit? 你正在使用什么UT(过滤器,垫?)。 如果UT辐射也可能是一个麻烦。 所有频率的问题都只是一个子集吗? 以上来自于谷歌翻译 以下为原文 What FW? What Calkit are you using? What is the UT that you are using (filter, pad?) . If the UT radiates that can be a trouble as well. Is the trouble at all frequencies are at just a subset? |
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