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problem with port boundary condition

Posted 7 mars 2013, 10:41 UTC−5 RF & Microwave Engineering 3 Replies

Sara Kian
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Hi,

I am trying to simulate a coupler so I need to set a port as inport and I have to select "wave excitation at this port " check box but it's inactive.
How can I activate it?

Thanks,

sara
3 Replies Last Post 8 mars 2013, 18:37 UTC−5
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 7 mars 2013, 15:42 UTC−5
Hi

if yI remember well there are some limitations on the boundaries where these can apply (eiteh internal or external but how it was back in 3.5 times is getting to vague for me, try to check the doc, and verify for which type of boundary it applies

--
Good luck
Ivar
Hi if yI remember well there are some limitations on the boundaries where these can apply (eiteh internal or external but how it was back in 3.5 times is getting to vague for me, try to check the doc, and verify for which type of boundary it applies -- Good luck Ivar
Sara Kian
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Posted: 1 decade ago 8 mars 2013, 14:03 UTC−5

Hi Ivar,

Thanks, the problem was that it was defined as an inner boundary,I apply the sourc (the defult of comsol) ,but there is no wave propagation so S-parameter does not return any diagram, what should I do?

Best Regards,

Sara
Hi Ivar, Thanks, the problem was that it was defined as an inner boundary,I apply the sourc (the defult of comsol) ,but there is no wave propagation so S-parameter does not return any diagram, what should I do? Best Regards, Sara
Robert Koslover Certified Consultant
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Posted: 1 decade ago 8 mars 2013, 18:37 UTC−5
The simplest rule here is, "Don't try to define an internal boundary as a port." I have found that it is generally possible to configure the geometry of just about any problem so that ports can always be placed on only external boundaries.
The simplest rule here is, "Don't try to define an internal boundary as a port." I have found that it is generally possible to configure the geometry of just about any problem so that ports can always be placed on only external boundaries.

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