CST MWS S11曲線低頻有波紋

S11 曲線 低頻出現(xiàn)抖動(dòng) 有波紋 仿真是沒(méi)有出現(xiàn)錯(cuò)誤 但是出現(xiàn)了兩個(gè)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(qǐng)問(wèn)這樣的仿真結(jié)果可行么？想做實(shí)物測(cè)試。 應(yīng)如何改進(jìn)？求大神指導(dǎo)

請(qǐng)學(xué)會(huì)使用軟件的幫助文件。
有波紋說(shuō)明殘余能量過(guò)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(gè)提示本身已經(jīng)告訴你可能的解決方案了。

有波紋一般是網(wǎng)格設(shè)置的問(wèn)題，你把網(wǎng)格設(shè)置得再小點(diǎn)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(wǎng)格無(wú)關(guān)！

不是網(wǎng)格設(shè)置的太大，然后能量消散沒(méi)到設(shè)定值就停止了嗎

能量能不能消散和網(wǎng)格大小多少無(wú)關(guān)。