The active electronically scanned array (AESA) also uses multiple modules but each can send a different radio signal (different in frequency or direction) allowing a greater degree of versatility, and making the radar harder to jam. The first PESA fighter radar was carried by the MiG-31, which entered service in 1981. The PESA is relatively simple to create, but not as versatile as the AESA. The passive electronically scanning array radar (PESA) have a single radio source that sends energy to multiple receive/transmit modules. The latter can be divided into three categories: passive scanning, active scanning and ‘hybrid tilters’. There are two types of fighter radar, mechanical- and electronically scanning. That aircraft like the Rafale and Super Hornet are equally adept at the air superiority and ground attack missions has a great deal to do with the extreme versatility of the contemporary radar, which can simultaneously scan the air for fighters as it looks for ground targets. In the future AESAs will even be able to ‘fry’ enemy radars by overloading them with radio energy. As well as detection, modern sets can be used to jam, communicate and collect information about enemy sensors and communications. Up until the 1980s operating a radar effectively required a great degree of skill today’s digital radars are simple to use, long-ranged and harder to jam than ever. The primary sensor of the modern fighter remains the radar.
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