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Rotating-Wave Electromagnetic

Posted May 4, 2020, 12:16 a.m. EDT RF & Microwave Engineering 4 Replies

Fabian Barragan
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hi would I like to know if there is an example simulated a Rotating-Wave Electromagnetic?

Thank you.

4 Replies Last Post May 12, 2020, 11:57 p.m. EDT
Robert Koslover Certified Consultant
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Posted: 5 years ago May 5, 2020, 10:15 p.m. EDT

To clarify: by "rotating-wave electromagnetic," do you mean a circularly-polarized electromagnetic wave?

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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
To clarify: by "rotating-wave electromagnetic," do you mean a circularly-polarized electromagnetic wave?
Fabian Barragan
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Posted: 5 years ago May 8, 2020, 12:21 a.m. EDT

yes circularly-polarized electromagnetic wave as is show in the figure.

Could I simulate a cylindrical cavity in 3d with two ports at the bottom of the cavity with this type of wave (figure)?

Thanks for the help.

yes circularly-polarized electromagnetic wave as is show in the figure. Could I simulate a cylindrical cavity in 3d with two ports at the bottom of the cavity with this type of wave (figure)? Thanks for the help.

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Robert Koslover Certified Consultant
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Posted: 5 years ago May 8, 2020, 2:38 p.m. EDT

I don't know if Comsol provides an example model. You could look though the RF-module library files. Regardless, you can launch user-defined waves via either ports with "user-defined" fields or with scattering BCs with user-defined fields. You'll have to enter the field expressions yourself. If you find it confusing, start with simpler expressions and watch how they behave in the model. Make sure you can launch plane waves, for example. (And bear in mind that a circularly polarized wave can be written as a superposition of two linearly polarized waves with the same k-vector, but with orthogonal E vectors, and where one of them lags the other by 90 deg in phase.

-------------------
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
I don't know if Comsol provides an example model. You could look though the RF-module library files. Regardless, you can launch user-defined waves via either ports with "user-defined" fields or with scattering BCs with user-defined fields. You'll have to enter the field expressions yourself. If you find it confusing, start with simpler expressions and watch how they behave in the model. Make sure you can launch plane waves, for example. (And bear in mind that a circularly polarized wave can be written as a superposition of two linearly polarized waves with the same k-vector, but with orthogonal E vectors, and where one of them lags the other by 90 deg in phase.
Fabian Barragan
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Posted: 5 years ago May 12, 2020, 11:57 p.m. EDT

Thanks

Thanks

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