可能由TRL校准错误引起的去嵌入错误

这是问题，我想解嵌我的夹具的S参数。
因此，为了得到我的灯具的S参数，我让PCB在DUT侧进行TRL校准以获得夹具。
首先，我对我的VNA进行了电子校准并将状态保存为cset1。
然后我使用TRL PCB进行了TRL校准，并将状态保存为cset2。
然后我使用这两个保存的校准集得到S参数，这是由VNA计算的。
但是，我得到的S参数是错误的。
我的夹具将特征Z0从50Ω传输到10Ω，之前已经过测试。
但在使用ADS测试S参数后，我发现它无法传输50Ω至10Ω。
我使用的VNA是N5227A，我的操作程序如下面的附件。
2.bmp933.1 KB3.bmp922.7 KB4.bmp937.3 KB5.bmp1.2 MB9.bmp738.4 KB10.bmp733.2 KB11.bmp739.8 KB12.bmp1.2 MB



     以下为原文

  Here is the problem, I want to de-embed the S-parameters of my fixture. So, to get the S-parameters of my fixture,  I made the PCBs to do TRL calibration at the DUT sides for my fixture. First, I e-calibrated my VNA and saved the state as cset1. Then I did the TRL calibration using the TRL PCBs and saved the state as cset2. Then I got the S-parameters using these two saved calsets, which is calculated by VNA.  

However, the S-parameters I got was wrong. My fixture transfers the characterized Z0 from 50 Ω to 10 Ω and this was tested before. But after testing the S-parameters using ADS, I found that it couldn't transfer 50 Ω to 10 Ω.

The VNA I use is N5227A and my operating procedure is as the attachments below.   
附件

• 1.bmp840.3 KB
• 2.bmp933.1 KB
• 3.bmp922.7 KB
• 4.bmp937.3 KB
• 5.bmp1.2 MB
• 9.bmp738.4 KB
• 10.bmp733.2 KB
• 11.bmp739.8 KB
• 12.bmp1.2 MB