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Need help: Error whenever trying to simulate periodic boundary condition in RF module

Posted 22.09.2012, 06:50 GMT-4 RF & Microwave Engineering Version 4.3 3 Replies

Aimi Abass
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Hi Everybody,

I'm trying to do 3D RF module simulation with periodic boundary condition on the sides. Every time i start the computation, i keep getting an error that says :

Unknown function or operator.
- Name: mod1.emw.dst2src_pc1

I guess this error is related to the periodic boundary condition as when i run it with perfect conductor boundaries it works fine. Does this mean my comsol do not have this function or something?


Thanks in advance for any assistance / suggestion
3 Replies Last Post 21.12.2012, 16:14 GMT-5
COMSOL Moderator

Hello Aimi Abass

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

Hossein Alisafaee
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Posted: 1 decade ago 05.12.2012, 16:58 GMT-5
Hi,

I am getting the same error. Have you solved the problem?
Hi, I am getting the same error. Have you solved the problem?
Andrea Ferrario COMSOL Employee

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Posted: 1 decade ago 06.12.2012, 09:37 GMT-5
Aimi, Hossein,

The error is probably caused by an incorrect setup. See the model fresnel_equations in the Model Library, RF Module -> Verification Models for a simple example on how to setup boundary conditions.
If you still experience the same error (in version 4.3a), please send the problematic model to support ( www.comsol.com/support/case/ ) adding a reference to this thread.

--
Andrea Ferrario
Electromagnetics Group
COMSOL AB
Aimi, Hossein, The error is probably caused by an incorrect setup. See the model fresnel_equations in the Model Library, RF Module -> Verification Models for a simple example on how to setup boundary conditions. If you still experience the same error (in version 4.3a), please send the problematic model to support ( http://www.comsol.com/support/case/ ) adding a reference to this thread. -- Andrea Ferrario Electromagnetics Group COMSOL AB
Hossein Alisafaee
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Posted: 1 decade ago 21.12.2012, 16:14 GMT-5

Aimi, Hossein,

The error is probably caused by an incorrect setup. See the model fresnel_equations in the Model Library, RF Module -> Verification Models for a simple example on how to setup boundary conditions.
If you still experience the same error (in version 4.3a), please send the problematic model to support ( www.comsol.com/support/case/ ) adding a reference to this thread.

--
Andrea Ferrario
Electromagnetics Group
COMSOL AB


Thanks Andera,

The problem solved... the error happens after having more than 2 surfaces on a single PBC, type Floquet. So, to have periodicity in 2 dimentions, there are two PBCs needed, one for X and another for Y.

Good Luck
[QUOTE] Aimi, Hossein, The error is probably caused by an incorrect setup. See the model fresnel_equations in the Model Library, RF Module -> Verification Models for a simple example on how to setup boundary conditions. If you still experience the same error (in version 4.3a), please send the problematic model to support ( http://www.comsol.com/support/case/ ) adding a reference to this thread. -- Andrea Ferrario Electromagnetics Group COMSOL AB [/QUOTE] Thanks Andera, The problem solved... the error happens after having more than 2 surfaces on a single PBC, type Floquet. So, to have periodicity in 2 dimentions, there are two PBCs needed, one for X and another for Y. Good Luck

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