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AN/APG-77

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AN/APG-77
File:APG-77-1A.jpg
AN/APG-77
Country of originUnited States
TypeSolid-state active electronically scanned array (AESA)
Azimuth120°
Power20 kW peak[citation needed]

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).

AN/APG-77 in the National Electronics Museum.

The APG-77 provides 120° field of view in azimuth and elevation,[citation needed] 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

  1. ^ Hfradar.pdf page 19 for number of modules Archived April 22, 2006, at the Wayback Machine
  2. ^ http://www.acq.osd.mil/dsb/reports/ADA391893.pdf
  3. ^ Physical limitation of the maximum swivel angle of an AESA
  4. ^ http://www.webcitation.org/6Qpsm5PUo?url=http%3A%2F%2Fwww.f22-raptor.com%2Fmedia%2Fdocuments%2Faviation_week_010807.pdf
  5. ^ http://www.bga-aeroweb.com/Defense/F-22-Raptor.html
  6. ^ http://www.webcitation.org/6Qpsm5PUo?url=http%3A%2F%2Fwww.f22-raptor.com%2Fmedia%2Fdocuments%2Faviation_week_010807.pdf
  7. ^ https://defense-update.com/newscast/0407/news_020407.htm#raptor
  8. ^ https://www.forecastinternational.com/archive/disp_pdf.cfm?DACH_RECNO=942
  9. ^ https://defense-update.com/newscast/0407/news_020407.htm#raptor
  10. ^ Northrop Successfully Completes F-22 Radar Flight-Test Certification
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