有没有哪位有仿真微带线的实例啊？

05-08

我在仿真微带线的结构时，从理论上来讲，S11和S22应该是一样大的，为什么我的S11和S22的值不一样，请问这是什么原因?谁有做过这样的仿真，谢啦！

Then how different are they? Resonance frequency shifting or numerical value difference?

可以不用管它，这个好像和微带线的长度和反射有关系

S11跟S22不一定是一样大啊。端口反射不一定就是一样的啊

numerical value difference，and the different area of the waveport I set, the value of the S11and S22 will be different. So I want to konw what the connection between them? Thank you！

麻烦再问一下，为什么我waveport端口的面积大小设置的不一样，S11和S22出来的结果不一样?还有我是应该用 Driven Terminal还用Driven Modal 在访这个传输线的时候?谢啦！

但我只是单一的一个结构，完全对称的，端口设置也一模一样，所以从理论上来讲，S11和S22应该是一样的啊?

也许是设置网格的时候两端不完全一致

If the resonance frequencies are nearly the same and only absolute value difference, generally, I'll consider that the mesh density may be sufficient but other configurations may be reviewed.
About the waveguide port configuration for microstrip structure, CST Help file suggests the ideal width of the port should be 10 times as wide as the width of microstrip. However, if that isn't implementable for the geometrical constraints reason, that can be reduced to 6 times.

Or, if that is based on picked geometry, you need an extension space of ideally 4.5 times the width of the microstrip line at each side of the microstrip line. Furthermore, you should specify a distance of 4 times the substrate height above the microstrip line.

如果结构对称的话理论上S11和 S22是一样的如果结构不对称那就不一定

毕竟是数值解，只要在合理的误差范围内就可以了，不可能完全一样

期待高人帮忙解答

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