AESAen er mere avanceret, sofistikeret og er anden generation af den originale PESA fasede radioantennegruppe teknologi. (PESAs kan kun udsende én radiostråle ad gangen.) AESAen kan udsende flere radiobølgestråler samtidigt.<ref name="KRISHNANS"/> AESA-radarer kan sprede deres signaludsendelse over et bredere frekvensinterval, hvilket gør dem meget sværere af opdage, hvilket tillader skibe og luftfartøjer at udstråle radarsignaler, men alligevel være svære at opdage.<ref name="KRISHNANS"/><ref name="aviationintel">[http://aviationintel.com/the-great-radar-race-aesa-development-in-high-gear/ May 27, 2011, aviationintel.com: The great RADAR race: AESA development in high gear] Citat: "...On the other hand, AESA radars can be very hard to detect by the enemy via multiple methods such as frequency hoping, modulating a continuous wave signal and using the very least amount of power to detect, track and engage a target...Finally, AESA radars and their incredibly capable software and computer backends can act as information transmitters as well. This sounds strange but it is true, because the radars can modulate and transmit radiation so quickly they can also eventually transmit large amounts of information such a high-resolution streaming video to receivers...", [https://web.archive.org/web/20180112141436/http://aviationintel.com/the-great-radar-race-aesa-development-in-high-gear/ backup]</ref>
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