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finding back propagating eigen modes

Posted Jun 20, 2011, 10:11 a.m. EDT RF & Microwave Engineering Version 3.5a 1 Reply

Shakeeb Bin Hasan
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Hi,

I am solving for waveguide eigen modes using Perpendicular waves application mode in the RF module of Comsol 3.5a. By default, it is made to search for forward propagating modes (real(neff_rfwv)>0). However, I am interested in backward modes which propagate in the opposite direction and have real(neff_rfwv)<0. Is there any way I could tell Comsol to do that using the same application mode? I thought that may be I just need to inverse the sign of lambda somewhere but it doesn't look that apparent in equation systems view.

Thanks in anticipation
Shakeeb
1 Reply Last Post Jun 20, 2011, 10:59 a.m. EDT
Shakeeb Bin Hasan
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Posted: 1 decade ago Jun 20, 2011, 10:59 a.m. EDT
Although I prefer to stick with 3.5a but I won't mind skipping to 4.1 if someone can tell me it is possible there.

Thanks
Although I prefer to stick with 3.5a but I won't mind skipping to 4.1 if someone can tell me it is possible there. Thanks

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