The calculation seems to be unstable! A possible source of instability could be given by inaccurate definition of internal waveguide ports. Please consider to increase the dimension or shield your waveguide.
internal waveguide ports是什么意思？模型中只有一个波导端口，就是给微带线激励的端口。
求哪位工程师指点一下谢谢啦
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