antenna axial ratio

Hello RF people,

I'm looking for the table (or plot or formula) linking the Antenna Axial Ratio and the related Cross Polarization level.

Thanks in advance.

Lupin

X=(|r|+1)/(|r|-1) * (|r|+1)/(|r|-1)

if r=3dB=0.707 ->X=34=15.3dB

where X is XPD ,r is ratio axial.

Again on Axial Ratio topic:

I am looking for a table (or a graphic) putting in relationship the Axial Ratio with the Input ports Amplitude unbalancement.

Please, can you provide it?

Thanks in advance.

Lupin