在连接开关的情况下查看各个传输参数的相位。
我怀疑你可能会看到数据中的相位反转。
Sdd21只是4个S参数的向量和，所以如果它显示不好，它必须来自底层的单端S参数。
如果您使用ecal，默认情况下它使用未知的直通校准。
通过未知通过你必须知道+ -90度未知通过的阶段。
通常情况下，Ecal处理这个问题没有问题，但我想知道交换机的不匹配是否会使Ecal默认估计混乱。
您可以尝试为ecal选择“修改cal：更改校准方法”，然后选择“Ecal as defined thru”而不是“Ecal as unknown thru”。
看看是否能解决问题。
以上来自于谷歌翻译
以下为原文
Look at the phase of the individual transmission parameters with your switch attached. I suspect you might see a phase reversal in that data. Sdd21 is just the vector sum of 4 S-parameters, and so if it shows bad, it must be from the underlying single-ended S-parameters.
If you use an ecal, by default it uses unknown thru calibrations. With unknown thru you have to know withing +-90 degrees the phase of the unknown thru. Normally the Ecal handles this with no problem, but I wonder if bad mismatch from the switch is making confusing the Ecal default thru estimate.
You can try to select "modify cal: change cal methods" for ecal and then select "Ecal as defined thru" instead of "Ecal as unknown thru". See if that fixes the issue.
在连接开关的情况下查看各个传输参数的相位。
我怀疑你可能会看到数据中的相位反转。
Sdd21只是4个S参数的向量和，所以如果它显示不好，它必须来自底层的单端S参数。
如果您使用ecal，默认情况下它使用未知的直通校准。
通过未知通过你必须知道+ -90度未知通过的阶段。
通常情况下，Ecal处理这个问题没有问题，但我想知道交换机的不匹配是否会使Ecal默认估计混乱。
您可以尝试为ecal选择“修改cal：更改校准方法”，然后选择“Ecal as defined thru”而不是“Ecal as unknown thru”。
看看是否能解决问题。
以上来自于谷歌翻译
以下为原文
Look at the phase of the individual transmission parameters with your switch attached. I suspect you might see a phase reversal in that data. Sdd21 is just the vector sum of 4 S-parameters, and so if it shows bad, it must be from the underlying single-ended S-parameters.
If you use an ecal, by default it uses unknown thru calibrations. With unknown thru you have to know withing +-90 degrees the phase of the unknown thru. Normally the Ecal handles this with no problem, but I wonder if bad mismatch from the switch is making confusing the Ecal default thru estimate.
You can try to select "modify cal: change cal methods" for ecal and then select "Ecal as defined thru" instead of "Ecal as unknown thru". See if that fixes the issue.
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