如何设置端口并正确定义衬底和层结构

夏娃，我会尽力帮助你，但我知道在Momentum ADS中还有其他一些我不太了解的问题。
如果你没有正确设置（这就是问题所在）你就会变得垃圾。
以下是一些常规步骤：1。导入或创建自己的布局。
您必须在相应的图层中映射铜，使用“LAYERS”调色板来了解可用的内容。
否则，添加更多图层2.创建基材。
这是PCB堆叠！
添加所有图层，Er和图层厚度3.创建布局图层 - 您可以在此处告诉工具您想要导体所在的图层。顶部，底部等...添加所有参数，如电导率等。
.. 4.添加端口。
这有点棘手。
如果您正在进行单端口或差分SIM卡，则需要沿正确的X坐标或y坐标对齐端口。
未能将它们放在写入坐标中会给您带来错误。
你必须为差分模拟器和单端口排队。
使用至少一个端口作为SIM的地面参考。
5.设置MESH。
我通常会添加我认为将在基板上运行的最高频率。
我做1GHz 6.设置S参数使用自适应并输入S参数的范围。
7.模拟我知道这是非常通用的，你会有挫折感。
稍后您需要通过测量验证模拟。
这是您实现（就像我一样）您的模拟与测量不一致的地方。
它不是产生错误答案的工具，它是设置叠层，网格，端口等的问题......所有这些必须是正确的，以便接近测量值。
我目前正在努力，因为CST EM工具准确地预测了天线模型，Momentum没有...我很生气这些论坛中没有人帮忙！
只是潜伏者而不是帮助！
抱歉咆哮！
祝你好运！



     以下为原文

  Eve,

I will try to help you but know that there are other issues I don't quite understand either in Momentum ADS.  If you don't set up things right(and that is where the issue lies) you get garbage.

Here are some general steps:

1. Import or create your own layout.  You must map the copper in the respective layers, use the "LAYERS" palette to know what is available.  Otherwise, add more layers
2. Create the substrate.  This is the PCB stack up!  Add all the layers, Er, and layer thicknesses
3. Create layout layers -  this is where you will tell the tool which layer your want the conductors to be in.  Top, bottom etc...  Add all the parameters such as conductivity etc...
4. Add ports.  This is a bit tricky.  If you are doing single port or differential sims, you need to line up the ports along the correct X coordinates or y coordinates.  Failure to position them in the write coordinates, will give you errors.  You have to line them up for differential sims, and for single port too.  Use at least one port as ground reference for the sim.
5.Setup the MESH.  I normally add the highest frequency I think will be running on the substrate.  I do a 1GHz
6. Setup the S-parameter use Adaptive and enter a range for the S-parameters.
7. Simulate

I know this is very generic and you will have your share of frustration getting it going.  Later you need to validate the simulation with measurement.  This is where you realize (as I did) your simulation doesn't agree with the measurement.  It is not the tool generating the wrong answer, it is an issue with setting up the stackup, mesh, ports, etc...  All these have to be right in order to get close to measured values.

I am currently struggling since CST EM tool predicts accurately an antenna model, and Momentum does not... I am irritated no one in these forums help out!  Just lurkers and not help!  Sorry about ranting!

Good luck!