How to measure ip3 of an active antenna ?

[purushottam]

How to measure ip3 of an active antenna (say 20-3000 MHz)?Equipment available:spectrum analyzer, N/work analyzer, Signal Generator,test range, etc.

 

[sergio mariotti]

SA as receiver
Signal Generator combined with N/work Ana (CW) as generators

In my opinion the IP3 measurement don't require high degree of accuracy, so the accuracy of SA may be enough.
IP3 change a little vs frequency, so you don't need many freq. points.

 

[amnon]

for what purpose do you need to use active antenna's IP3?
usually it's IP3 is very high and doesnt require any measurements