如何设置CPWG的基础？

> {quote：title = jeff0283写道：} {quote}>（pic1.png）在布局中放置地面符号不会有任何影响。
您最好创建从侧面地面到底部地平面的物理连接（即绘制物理通道）。
>在em设置中，我将导体穿过基板，将孔设置到孔（5）层。
>（pic2.png）>>返回布局，我选择所有octangle via并将它们设置为孔：绘图层。
>>我的设置正确吗？
是的，这种建模方法看起来正确。
您可以仔细检查3D EM预览，以确保过孔确实包含在EM模型中。
对于垂直线（从北侧），在相当长的一段时间内没有通过围栏，因此侧面地面可能与底部地面的电位相当不同。
但这就是你在布局中所拥有的 - 而Momentum将展示这是否会导致问题。
>我发现工具栏上有一个标签插入地面。
>我可以插入接地引脚而不是通孔吗？
不需要。对于Momentum，您需要物理（绘制）过孔。



     以下为原文

  > {quote:title=jeff0283 wrote:}{quote}
 
>  (pic1.png) 

Placing ground symbols in the layout will not have any effect. You better create a physical connection from the side grounds to the bottom ground plane (i.e. draw physical via).

> At the em setup, I map the conductor via in the substrate, setting the hole to the hole(5) layer.
>  (pic2.png) 
> 
> Back to the layout, I select all the octangle via and set them to the hole:drawing layer.
> 
> Is my setting right??

Yes, this modelling approach looks right. You can double check in the 3D EM preview to make sure the vias are indeed included in the EM model.

For the vertical line (from north side) there is no via fence over quite some length, so the side grounds can be at rather different potential than the bottom ground. But that is what you have in layout - and Momentum will show if this is causing issues or not.

 
> I find there is a tab Insert ground on the toolbar.
> Can I insert a ground pin and don't place via holes??
 
No. For Momentum you need physical (drawn) vias.

> {quote：title = jeff0283写道：} {quote}>我附上我的预览。
过孔是否包含在EM模型中？
是的，我们*在3D视图中看到*它们，因此*包括在内。
未在3D基板中映射的图层在3D视图中将不可见。
>你说在相当长的一段时间内没有通过栅栏，它是黄色部分吗？
是的，这就是我的意思。
我不知道电路那部分的频率，但是例如连接到顶部接地的SMD部分没有直接连接到底部接地。
此外，对于该线路的输入，PCB不连接顶部和底部接地。
这意味着在那里流动的夹持电流可能需要很长的路径，直到它可以从顶部流到底部。
根据频率的不同，这会导致麻烦。



     以下为原文

  > {quote:title=jeff0283 wrote:}{quote}
> I attach my em preview. Are the vias included in the EM model?

Yes, we *see* them in the 3D view, so they *are* included. 
Layers that are not mapped in the EM substrate will not be visible in the 3D view.

> You say there is no via fence over quite some length, and is it the yellow part??

Yes, that is what I meant. I don't know the frequency in that part of the circuit, but for example the SMD part connected to the top ground there has no direct connection to the bottom ground. Also, for the input to that line, the PCB does not connect top and bottom grounds. This means that griund current flow there can require a long path until it can flow from top to bottom. This can (will) cause trouble, depending on frequency.