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How to judge the way of polarization(circular polarization or linear polarization)

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Hello,everyone I want to know how to judge the way of polarization(circular polarization or linear polarization)according to the radation pattern of axial ratio in the polar plot group.


1 Reply Last Post 5 sept. 2020, 12:18 UTC−4
Robert Koslover Certified Consultant

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Posted: 4 years ago 5 sept. 2020, 12:18 UTC−4

In regard to definitions, see http://www.antenna-theory.com/definitions/axial.php or https://en.wikipedia.org/wiki/Elliptical_polarization . In regard to checking the handedness of circular polarization, or for a quick/qualitative view of the orientation and ellipticity of the polarization, I usually just plot an animation using Comsol's arrow-plot on a surface capability, and watch the E vector sweep around as the wave phase varies. You can do this with the fields in/on your model volume, or you can even do it for far-field plots on finite surfaces. For example, you can do an arrow plot of Efarx, Efary, and Efarz on a hemispherical surface around the origin.

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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
In regard to definitions, see http://www.antenna-theory.com/definitions/axial.php or https://en.wikipedia.org/wiki/Elliptical_polarization . In regard to checking the handedness of circular polarization, or for a quick/qualitative view of the orientation and ellipticity of the polarization, I usually just plot an animation using Comsol's arrow-plot on a surface capability, and watch the E vector sweep around as the wave phase varies. You can do this with the fields in/on your model volume, or you can even do it for *far-field* plots on finite surfaces. For example, you can do an arrow plot of Efarx, Efary, and Efarz on a hemispherical surface around the origin.

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