Active cancellation effective?

I’m told most current radar/electronic software can detect Active cancellation systems deployed against them. Worse, they can even track the emitter because it emits a signal.

Here’s a quick reference:

http://www.geocities.com/CapeCanaveral/9735/rafale1.htm

If so, it would mean a lot of these systems would now be redundant. For example I havnt heard of any active systems being incorporated into the F-22, Typhoon or F35, or any other newer aircraft.

It seemed like a good idea in the ninties…