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在模拟我的设计基板时,我收到以下警告:在最高模拟频率下找到具有大电气厚度的层!
层厚度= 10 mm,介电常数= 81结果: - 基板数据库生成可能不会收敛。 考虑: - 降低层的厚度; - 降低层的介电常数 - 降低最大频率。 为什么会出现这个问题 较低的电介质导致更高的波长或电气厚度。 为什么建议降低介电常数? 任何人都可以告诉我这个警告的科学原因吗?编辑:m01tab4于2013年12月16日下午1:09 以上来自于谷歌翻译 以下为原文 In simulating the substrate of my design, I get the following warning : Layer found with a large electrical thickness at the highest simulation frequency! Layer thickness = 10 mm, dielectric constant = 81 Consequence : - substrate database generation may not converge. Consider : - lowering the thickness of the layer ; - lowering the dielectric constant of the layer - lowering the maximum freqency. Why this problem happened? The lower dielectric leads to higher wave length or electrical thickness i guess. Why it suggest to reduce the dielectric constant? can any one please explian me the scientific reason of this warning? Edited by: m01tab4 on Dec 16, 2013 1:09 PM |
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从工具的角度来看,你要求它做一些不是现实生活或现实生活的事情。
诸如FR-4(或其他物质)的常规基底可以薄至400um并且厚至6.35mm。 在你的情况下,你要求模拟10毫米的厚度,这是不现实的。 在10mm处没有迹线会有一个参考平面作为微带线,例如,因为你太遥远了。 典型的厚度可以是几微米到几毫米,但不是一个数量级。 我个人从未见过厚厚的基材。 请更具体地说明您要做的事情,也许其他人可能会帮助您。 以上来自于谷歌翻译 以下为原文 From the tool perspective you are asking it to do something that is not real life nor realistic. A regular substrate such as FR-4 (or others for that matter) can be as thin as 400um and as thick as 6.35mm. In your case you are asking to model a thickness 10mm which is not realistic I think. At 10mm no trace will have a reference plane to be a microstrip for example since you would be too far away. Typical thickness can be few microns to few mm but not one order of magnitude. I personally have never seen a substrate that thick. Please be more specific in what you are trying to do and maybe other people might be able to help you. |
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