Look i did not mean that X or Y is able or unale to efficiently jam and dete t/track at the same time. I just mean that in most cases it is a very difficult task and it is better if the antenna is physically divided in “subantennas” able to perform different tasks simultaneously.
Well if you’re an ESA you can. since the beamsteering is not mechanical, it can basically switch to other direction instantaneously. Thus allow precise timing (and getting enough time) on what you want to do in what direction. The only limit would be frequency allocation and coverage. good example would be Zaslon which manage 4 SARH guidance simultaneously, something no fighter radar in her era could do.
This is typical fighter radar timing sequences
[ATTACH=CONFIG]261151[/ATTACH]
with ESA.. you can have them all sorted out and done. Almost instantaneously.
Some addition.
Critics toward using AESA radar as jammer lies in the fact one can only do that in limited amount of frequency, remember that physical spacing of radiators and width of the TR modules determine your frequency range, plus it might be put the radar in danger of being exploited for passive geolocation or anti radiation missile attack.
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