CST MWS S11曲線低頻有波紋

S11 曲線 低頻出現(xiàn)抖動 有波紋 仿真是沒有出現(xiàn)錯誤 但是出現(xiàn)了兩個警告
（1）The topology of port 1 has changed after adaptive port meshing. This could influence the 3D simulation as well as the port modes
（2）Some higher order propagating modes at port 1 are not considered in time domain calculation. This possibly leads to an inaccurate energy balance. Consider to increase the number of modes or decrease the upper frequency limit
請問這樣的仿真結果可行么？想做實物測試。 應如何改進？求大神指導

請學會使用軟件的幫助文件。
有波紋說明殘余能量過高。CST MWS幫助文件《Time Domain Solver Performance Improvements》。
CST MWS幫助文件《Mesh Problem Handling》：
The topology of port x has changed after adaptive port meshing. This could influence the 3D simulation as well as the port modes.
This case occurs when the port is inaccurately meshed.
Solution:
If mesh type "PBA" is selected, please consider using "FPBA" with "Enhance FPBA accuracy" (Mesh Properties->Specials...->Mesh type). The problem may also appear when the mesh density in the port region is insufficient to capture all geometric detail. In this case, a higher mesh resolution could solve the problem (Mesh Properties->Specials).
第二個提示本身已經告訴你可能的解決方案了。

有波紋一般是網格設置的問題，你把網格設置得再小點試試！

非常感謝您的幫助

非常感謝您的幫助

有波紋是field energy的原因，和網格無關！

不是網格設置的太大，然后能量消散沒到設定值就停止了嗎

能量能不能消散和網格大小多少無關。