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[SOLVED] Linear polarization antenna axial ratio

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How to calculate axial ratio from linear polarization data? What is the mathematical logic behind this?

For example, I wonder how you calculated the axial ratio in this data I got from CST. I tried to obtain the axial ratio using co, cross magnitude and phase values, but I could not get the same result as CST.
1739975069422.png


I did the right hand and left hand transformations with the equation below, but I could not get the same result.

1739975147319.jpeg


I obtained a result based on the Linear to circular polarization conversion equation in the article I shared below. These results were close to the values in CST, but in fact this formula is not exactly result-oriented. It progresses more as an approximation. How can the axial ratio value be calculated from linear polarization?

Linear to circular polarization conversion
 

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