Discussion Forum

Hi

you can define a local coordinate system, see the doc and search on the knowledge base there are examples.

For the Gaussian beam you need normally to define the transverse Gaussian field distribution (by an equation) and the propagation vector k, but now I havent done it in 3.5 for so long that I'm already forgetting the detailes of the "old" COMSOL specialities ;)

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Good luck
Ivar

Hello Ivar,

Thanks for your help. But it seems that it is not possible to define a local coordinate system in the RF module. Is it possible in version 4.0?

Thank you,

Avineet

Hi

yes in V4 you acn , in 3.5 then you must do it by "hand" and check that your values transformed back into the cartesian system still are valid

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Good luck
Ivar

Hello Ivar,

Does that mean I have to transform all the built-in equations(in the Equation System) in COMSOL to the new co-ordinate system too?

Thanks

Hello Ivar,

Is it possible to change the k (wave direction) in the 3.5 version of COMSOL? If yes, how do I change the wave direction?

Further, do I transform the equations written in the expression option itself or elsewhere? I need to chenge the wave direction somehow and I am not getting how to do it.

Thanks a lot,

Avineet

Thanks a lot Ivar.

I finally got an inclined beam.

Regards,

Avineet

Hi Avineet,

Could you please say how to define a gaussian beam in RF module, as you have already worked on it.
and also to give inclination.