|Country of origin||United States|
|Type||Solid-state active electronically scanned array (AESA)|
|Power||20 kW peak|
It is a solid-state, active electronically scanned array (AESA) radar. Composed of 1956 transmit/receive modules, each about the size of a gum stick, it can perform a near-instantaneous beam steering (in the order of tens of nanoseconds).
The APG-77 provides 120° field of view in azimuth and elevation, which is the highest possible value for a flat phased array antenna. Unconfirmed sources suggest that APG-77 has an operating range of 125–150 mi (201–241 km), against a 1 m2 (11 sq ft) target. A range of 400 km or more, against a 1 m2 (11 sq ft) target, with the APG-77v1 with newer GaAs modules, is believed to be possible while using more narrow beams.
The APG-77v1 was installed on F-22 Raptors from Lot 5 and on. This provided full air-to-ground functionality (high-resolution synthetic aperture radar mapping, ground moving target indication and track (GMTI/GMTT), automatic cueing and recognition, combat identification, and many other advanced features).
- "Future DoD Airborne High-Frequency Radar Needs/Resources" (PDF). Department of Defense. April 2001. p. 19. Archived from the original (PDF) on 2012-09-20.
- Physical limitation of the maximum swivel angle of an AESA
- "F-22 Road Show" (PDF). Aviation Week & Space Technology. 8 January 2007. pp. 2–7. Archived from the original on 5 July 2014.
- "F-22 Raptor". Aeroweb.
- "F-22 Raptor To Get Upgraded Radar". Defense Update. 2 April 2007.
- Northrop Successfully Completes F-22 Radar Flight-Test Certification