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problem with geometry & draw reflectinn spectrum of gating wave guide

Posted Mar 7, 2013, 2:35 a.m. EST RF & Microwave Engineering Version 4.4 4 Replies

Sara Kian
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Hi,

I am trying to simulate Bragg grating in SOI waveguide(attached to the massage) but I have a problem with drawing the geometry:
First: the horizontal scale is much larger than the vertical one so I can't draw it.

Second: I am not sure if I should draw the top-view of the grating in comsol like Fig.1 in paper.
Third : I don;t know which part of the comsol can help me to draw reflection & transmissin spectra of the waveguide.I guess S-parameter can help me but I dont know how I can apply source and which boundary conditions I should use.
Should I use RF module> In-plane wave > Te mode> harmonic ?

Thanks in advance,

Sara
4 Replies Last Post Oct 30, 2014, 9:27 a.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Mar 7, 2013, 7:36 a.m. EST
Hi

also in 3.5 there was a way to change the geoemtric view such to not scale X-Y axis equal, useful for very different scale models, such as MEMS

--
Good luck
Ivar
Hi also in 3.5 there was a way to change the geoemtric view such to not scale X-Y axis equal, useful for very different scale models, such as MEMS -- Good luck Ivar
Sara Kian
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Posted: 1 decade ago Mar 7, 2013, 8:52 a.m. EST
Hi,
Thanks for help , how about appying source ,comsol consider incident wave as "exp(-j*k0_rfwe*x)" is that enough to apply this field to a port in order to have source?

Best Regards,
Sara
Hi, Thanks for help , how about appying source ,comsol consider incident wave as "exp(-j*k0_rfwe*x)" is that enough to apply this field to a port in order to have source? Best Regards, Sara
Sara Kian
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Posted: 1 decade ago Mar 7, 2013, 10:03 a.m. EST
Hi,

I have a problem with inport , the check box " wave exitation at this port" is inactive, why? what should I do?

Thanks,

sara
Hi, I have a problem with inport , the check box " wave exitation at this port" is inactive, why? what should I do? Thanks, sara
晓妹 孙
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Posted: 1 decade ago Oct 30, 2014, 9:27 a.m. EDT

Hi,

I have a problem with inport , the check box " wave exitation at this port" is inactive, why? what should I do?

Thanks,

sara


Hi , i encounterd the same problem, can U share the solution with me?
Thank U very much.
[QUOTE] Hi, I have a problem with inport , the check box " wave exitation at this port" is inactive, why? what should I do? Thanks, sara [/QUOTE] Hi , i encounterd the same problem, can U share the solution with me? Thank U very much.

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