how though? the biggest advantage of AESA radar over PESA radar is that it can 1. frequency change rapidly and 2. transmit multiple frequencies simultaneously.
Because of that, it is much harder to jam (you can't focus all jamming on one frequency, and broadband jamming has less energy per given frequency) and much harder to detect (radar detection requires a series of pulses to identify, but AESA radar doesn't repeat pulses, every pulse changes frequency).
true Aesa provides multiple beams and harder to jamm than Pesa but here m not talking about Aesa features...
Once a fighter switches on its own radar the passive sensors can detect the signature and find out the location of target and in an integrated system same info can be relayed to 100 different radars thus making it a fair game to focus Irst or x band waves to same direction...
Thr is active and passive detected ... Rafale mostly uses its passive signatures unlike big russian planes with massive Pesa which rely on long detection ranges ... both have its usages...