360 coverge on F-22/J-20/F-35 is achievable in lots different ways RWR (Radar warning receiver)on all 4th/4.5th/5th gen jets are also kind of radars /AESA to cover rear area of jet, ETOS on F-35 can have this capability, as i says on my earlier post swashplate (mechanical turning) AESA will have this capability to detect side ways and fixed AESA has also to steer radio waves to 15 degree so they also have the capability to detect sideways, so this not true that Su-57 is first jet to cover whole 360 degree angles
@undertakerwwefan