how to find cross polarization from near field measurement

Dear all
can any one please help me,
how to find cross polarization from near field measurement system?
and which data will need to plot to get cross polarization for E plane and H plane?

thanks for your help

I think you need to remeasure the antenna but with prob rotate 90° to main polarization
of the antenna than after transform you will get the cross pattern.

thanx
i will try to remeasure.

Exactly !

In order to know the general EM field picture you need to measure the 2 orthogonal fields (amplitude and phase) and then you can reconstruct the general field everywhere in space, using mathematical transforms (supplied with the Near field scanners softwares).
Apply it for Far-Field and you can then find the Cross-Polarization ratio.

Heylal
RF-Link
www.rflinkcalc.com