AN/APG-77
![]() AN/APG-77 | |
Country of origin | United States |
---|---|
Type | Solid-state active electronically scanned array (AESA) |
Azimuth | 120° |
Power | 20 kW peak |
The AN/APG-77 is a multifunction Low probability of intercept radar installed on the F-22 Raptor fighter aircraft. The radar is built by Northrop Grumman.
It is a solid-state, active electronically scanned array (AESA) radar. Composed of 1956 transmit/receive modules,[1][2] each about the size of a gum stick, it can perform a near-instantaneous beam steering (in the order of tens of nanoseconds).
![](../I/m/AN-APG-77%2C_AESA%2C_Active_Electronically_Scanned_Array%2C_Northrop_Grumman%2C_2001_-_National_Electronics_Museum_-_DSC00388.jpg)
The APG-77 provides 120° field of view in azimuth and elevation, which is the highest possible value for a flat phased array antenna.[3] Unconfirmed sources suggest that APG-77 has an operating range of 125–150 mi (201–241 km),[4] 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.[5][6]
More than 100 APG-77 AESA radars have been produced to date by Northrop Grumman, and much of the technology developed for the APG-77 is being used in the APG-81 radar for the F-35 Lightning II.
The APG-77v1 was installed on F-22 Raptors from Lot 5 and on.[7] 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).[8][9][10]
See also
References
- ↑ Hfradar.pdf page 19 for number of modules Archived April 22, 2006, at the Wayback Machine.
- ↑ http://www.acq.osd.mil/dsb/reports/ADA391893.pdf
- ↑ Physical limitation of the maximum swivel angle of an AESA
- ↑ http://www.webcitation.org/6Qpsm5PUo?url=http%3A%2F%2Fwww.f22-raptor.com%2Fmedia%2Fdocuments%2Faviation_week_010807.pdf
- ↑ http://www.bga-aeroweb.com/Defense/F-22-Raptor.html
- ↑ http://www.webcitation.org/6Qpsm5PUo?url=http%3A%2F%2Fwww.f22-raptor.com%2Fmedia%2Fdocuments%2Faviation_week_010807.pdf
- ↑ https://defense-update.com/newscast/0407/news_020407.htm#raptor
- ↑ https://www.forecastinternational.com/archive/disp_pdf.cfm?DACH_RECNO=942
- ↑ https://defense-update.com/newscast/0407/news_020407.htm#raptor
- ↑ Northrop Successfully Completes F-22 Radar Flight-Test Certification
External links
- AN/APG-77 radar technology explained
- f22fighter.com: AN/APG-77
- http://www.globalsecurity.org/military/systems/aircraft/f-22-avionics.htm