怎么从DUT中去嵌入PCB参数

嗨，Joel博士，我目前正在考虑从我的DUT中去嵌入我的PCB。
我的DUT包括SMP发射+ PCB走线+封装+ IP。
SMP发射用于测量我们的DUT上的发射器的电气参数（上升时间，抖动等）。
我的PCB由SMP发射+ PCB走线组成。
基本上我想将我的参考平面从SMP移回到包*****，因为这是许多标准（PCIe等）要求参考电气测量的地方。
为了做到这一点，我通常在同一面板中的另一张卡上设计一个副本通道，具有相同的跟踪方向等，这与我的DUT通道相同（尽可能），除了我必须在我的DUT bga是另外的SMP启动时
为了使用VNA进行测量而定位。
然后我使用这些s参数并使用这些去嵌入我的电测量。
但是，我有这个额外的SMP发布，它正在被去嵌入，所以由于额外的SMP发布我有测量错误。
我正在做的是拥有一个复制通道卡，它基本上是两个PCB结构（SMP发射+ PCB走线+ bga + pcb走线+ SMP）。
我的想法是，我假设这个新结构只是我的两个目标结构，我可以使用去嵌入技术提取复合结构的参数将测量这个结构并使用T矩阵，我将能够确定更好的估计
通过后处理该测量来获得SMP发射+ PCB迹线+ bga）。
我目前在我们的实验室中使用N5225A进行这些测量我的问题是1）有没有办法使用N5225A直接进行这种测量1）我可以设置一些东西，如果这是一个已尝试的方法或是否有
你可以推荐更好的方法吗？
我已经包含了一个pdf的测量值和相关的s参数以及端口问候，盖伊



     以下为原文

  Hi Dr Joel,
I currently looking at de-embedding my PCB from my DUT.
My DUT consists of an SMP launch + PCB traces + package + IP. The SMP launch is used to measure electrical parameters of our transmitter on our DUT (risetime, jitter etc).

My PCB consists of SMP launch + PCB traces. Basically i want to move my reference plane back from the SMP to the package ***** as this is where many standards (PCIe etc) require the electrical measurements to be referenced.

To do this currently I usually design a replica channel on another card in the same panel with the same trace orientation etc. which is identical to my DUT channel (as possible) except that i have to place an additional SMP launch where my DUT bga is located in order to do the measurements using the VNA. I then use these s-parameters and de-embed my electrical measurements using these.

However, I have this additional SMP launch which is being de-embedded and so I have measurement errors due to the additional SMP launch.

What I am looking at doing is having a replica channel card which is basically two of PCB structures (SMP launch + PCB traces + bga + pcb traces + SMP). The idea is that I assume that this new structure is simply two of my target structures and I can extract the sparameters of the compound structure using de-embedding techniques will measure this structure and using T matrices, i will be able to determine a better estimation of the  channel by post processing this measurement to obtain the SMP launch + PCB traces + bga).

I currently use the N5225A in our lab to do these measurements

My questions are
1) is there any way to use the N5225A to do this measurement directly

1) can i set something is if this is a method that has been tried or is there a better method that you can recommend?

I have included a pdf of the measurements and the associated s-parameters with ports

Regards,
Guy   
附件

• S3_sparameter.pdf64.4 KB