端口1的布局引脚之间的距离很大

该消息表示文本所说的内容：端口的（+）和（ - ）之间的距离是电大的，即与波长相比不小。
你得到一个警告，因为通常，（+）和（ - ）之间的距离应该很小。
原因可能是厚基板，其中端口（ - ）位于基板底部的无限接地处，或者将不同的引脚组合成差分端口（具有电气大的引脚距离）。



以下为原文

The message means what the text says: the distance between the (+) and (-) of the port is electrically large, i.e. not small compared to the wavelength. You get a warning because usually, the distance between (+) and (-) should be small.

Reasons could be a thick substrate where the port (-) is at the infinite ground at the bottom of the substrate, or combining different pins into a differential ports (with pin distance that is electrically large).

嗨Volker，你是绝对正确的;
我的基板厚度是15密耳。
我想知道你是否知道我应该做什么而不影响模拟的准确性。
非常感谢你。
Mojtaba



以下为原文

Hi Volker,

You are absolutely right; my substrate's thickness is 15 mil. I was wondering if you know what I should do without compromising accuracy of the simulation.

Thank you very much.

Mojtaba

> {quote：title = Mojtaba77写道：}>我想知道你是否知道我应该做什么而不影响模拟的准确性。
嗨Mojtaba，如果不了解您想要建模的设备，就无法回答您的问题。
如果在基板的顶部和底部之间有激发，电气厚的基板不仅会在模拟中产生问题，而且实际上也会产生问题。
所以这不仅仅是模拟......你的基板材料是什么，你在硬件中使用什么类型的线/激励（微带，共面，背面共面...）？
最好的问候Volker



以下为原文

> {quote:title=Mojtaba77 wrote:}
> I was wondering if you know what I should do without compromising accuracy of the simulation.

Hi Mojtaba,

it is impossible to answer your question without knowing more about the device that you want to model. Electrically thick substrates will cause trouble not only in simulation, but also in reality, if you have an excitation between top and bottom of the substrate. So this is not just about simulation ...

What is your substrate material, and what type of line/excitation (microstrip, coplanar, ground back coplanar ...) do you use in the hardware?

Best regards
Volker

嗨Volker，我的基板是39，我只使用微带。
模拟频率为直流至18 GHz。
谢谢你，Mojtaba



以下为原文

Hi Volker,

My substrate er is 39 and I only use microstrip. The simulation frequency is dc to 18 GHz. Thank you,

Mojtaba

嗨Mojtaba，这里出了点问题...... er = 3.9应该在18GHz没问题，没有警告。
两个想法：检查基材定义是否存在尺寸/单位的错误。
您是否将多个引脚分组为差分端口？
最好的问候Volker PS：或者你真的是指er = 39 ???编辑：volker_muehlhaus于2014年5月6日上午9:29



以下为原文

Hi Mojtaba,

something is wrong here ... er=3.9 should be fine at 18GHz, without warnings.

Two ideas:
Check the substrate definition for a mistake with dimensions/units.
Have you grouped multiple pins into a differential port?

Best regards
Volker

PS: Or did you really mean er=39 ???

Edited by: volker_muehlhaus on May 6, 2014 9:29 AM

嗨，我的意思是39.Mojtaba



以下为原文

Hi,

I really mean 39.

Mojtaba

> {quote：title = Mojtaba77写道：} {quote}>我的意思是39.哎呀......基板厚度多达1/6波长？
我认为你会对基板中各种各样的虚假模式感到“有趣”，这也是导致动量问题的原因。
我没有使用这种极端的基板尺寸，但是会期望Momentum端口校准失败（因为校准理论需要单模传播）。



以下为原文

> {quote:title=Mojtaba77 wrote:}{quote}
> I really mean 39.


Ooops ... substrate thickness as much as 1/6 wavelength? I think you will have "fun" with all sorts of spurious modes in the substrate, and that is what also causes Momentum trouble. I haven't used such extreme substrate dimensions, but would expect Momentum port calibration to fail (because calibration theory requires single mode propagation).