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How to plot gain and axial ratio in frequency?

Posted Jul 29, 2022, 12:24 a.m. EDT RF & Microwave Engineering, Results & Visualization Version 6.0 3 Replies

Noki Lee
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'Gain' is defined on angles, however many papers show gain in frequency. Same for other antenna parameters such as 'axial ratio'.

I couldn't find an example in application libraries that COMSOL supports. Are there any fast ways to plot the spatial dependent antenna parameters in frequency?

I attached an example figure.

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3 Replies Last Post Jul 31, 2022, 6:53 p.m. EDT
Robert Koslover Certified Consultant
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Posted: 2 years ago Jul 30, 2022, 9:37 a.m. EDT
Updated: 2 years ago Jul 30, 2022, 9:37 a.m. EDT

Pick a point (or define a cut point) in your model that is physically along the direction (from the origin) of the peak gain. Then define a 1D point plot, at that point, where you evaluate the gain and/or the axial ratio vs. frequency.

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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
Pick a point (or define a cut point) in your model that is physically along the direction (from the origin) of the peak gain. Then define a 1D point plot, at that point, where you evaluate the gain and/or the axial ratio vs. frequency.
Noki Lee
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Posted: 2 years ago Jul 31, 2022, 2:30 p.m. EDT
Updated: 2 years ago Jul 31, 2022, 2:30 p.m. EDT

Pick a point (or define a cut point) in your model that is physically along the direction (from the origin) of the peak gain. Then define a 1D point plot, at that point, where you evaluate the gain and/or the axial ratio vs. frequency.

Then, does the picked point depend on users' purpose that they wish to plot?

>Pick a point (or define a cut point) in your model that is physically along the direction (from the origin) of the peak gain. Then define a 1D point plot, at that point, where you evaluate the gain and/or the axial ratio vs. frequency. Then, does the picked point depend on users' purpose that they wish to plot?
Robert Koslover Certified Consultant
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Posted: 2 years ago Jul 31, 2022, 6:53 p.m. EDT

If your purpose is to plot the gain in the direction of the peak value of the gain, or to plot the axial ratio in the direction of the peak value of the gain, then choose an evaluation point along the direction of the peak value of the gain. If you want to know either of those quantities in some other direction, then choose a point along that other direction.

-------------------
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
If your purpose is to plot the gain in the direction of the peak value of the gain, or to plot the axial ratio in the direction of the peak value of the gain, then choose an evaluation point along the direction of the peak value of the gain. If you want to know either of those quantities in some *other* direction, then choose a point along that *other* direction.

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