AN/APG-81

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AN/APG-81
AN-APG-81 Antenna, 2005 - National Electronics Museum - DSC00393.JPG
Country of originUnited States
Type Solid-state active electronically scanned array fire-control radar

The AN/APG-81 is an active electronically scanned array (AESA) fire-control radar system designed by Northrop Grumman Electronic Systems (formerly Westinghouse Electronic Systems) for the Lockheed Martin F-35 Lightning II. [1]

Contents

The Joint Strike Fighter AN/APG-81 AESA radar is a result of the US government's competition for the world's largest AESA acquisition contract. Westinghouse Electronic Systems (acquired by Northrop Grumman in 1996) and Hughes Aircraft (acquired by Raytheon in 1997) received contracts for the development of the Multifunction Integrated RF System/Multifunction Array (MIRFS/MFA) in February 1996. [2] Lockheed Martin and Northrop Grumman were selected as the winners of the Joint Strike Fighter competition; The System Development and Demonstration (SDD) contract was announced on 26 October 2001.

The AN/APG-81 is a successor radar to the F-22's AN/APG-77, and has an antenna composed of 1,676 transmit/receive modules. [3] Over three thousand AN/APG-81 AESA radars are expected to be ordered for the F-35, with production to run beyond 2035, and including large quantities of international orders.

Capabilities of the AN/APG-81 include the AN/APG-77's air-to-air modes, plus advanced air-to-ground modes, including high resolution mapping, multiple ground moving target indication and track, combat identification, electronic warfare, and ultra high bandwidth communications. [4] The F-22 radar from Lot 5 aircraft onward is the APG-77(V)1, which draws heavily on APG-81 hardware and software for its advanced air-to-ground capabilities. [5]

In August 2005, the APG-81 radar was flown for the first time aboard Northrop Grumman's BAC 1–11 test aircraft. The radar system had accumulated over 300 flight hours by 2010. The first radar flight on Lockheed Martin's CATBird avionics test-bed occurred in November 2008. [6]

In June 2009, the F-35s APG-81 active electronically scanned array radar was integrated in the Northern Edge 2009 large-scale military exercise when it was mounted on the front of a Northrop Grumman test aircraft. The test events "validated years of laboratory testing versus a wide array of threat systems, showcasing the extremely robust electronic warfare capabilities of the world's most advanced fighter fire-control radar." [7]

Announced on 22 June 2010: The radar met and exceeded its performance objectives successfully tracking long-range targets as part of the first mission systems test flights of the F-35 Lightning II BF-4 aircraft. [6]

The AN/APG-81 team won the 2010 David Packard Excellence in Acquisition Award for performance against jammers. [8]

In January 2023 it was reported that the AN/APG-81 would be replaced by a new radar, the AN/APG-85 on Block 4 F-35s. The AN/APG-85 had been mentioned in a budgetary document in December 2022. [9]

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<span class="mw-page-title-main">Northrop Grumman</span> Aerospace and defense technology corporation

Northrop Grumman Corporation is an American multinational aerospace and defense company. With 95,000 employees and an annual revenue in excess of $30 billion, it is one of the world's largest weapons manufacturers and military technology providers. The firm ranked No. 101 on the 2022 Fortune 500 list of America's largest corporations.

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<span class="mw-page-title-main">Active electronically scanned array</span> Type of phased array radar

An active electronically scanned array (AESA) is a type of phased array antenna, which is a computer-controlled antenna array in which the beam of radio waves can be electronically steered to point in different directions without moving the antenna. In the AESA, each antenna element is connected to a small solid-state transmit/receive module (TRM) under the control of a computer, which performs the functions of a transmitter and/or receiver for the antenna. This contrasts with a passive electronically scanned array (PESA), in which all the antenna elements are connected to a single transmitter and/or receiver through phase shifters under the control of the computer. AESA's main use is in radar, and these are known as active phased array radar (APAR).

The Medium Extended Air Defense System (MEADS) is a ground-mobile air and missile defense system intended to replace the Patriot missile system through a NATO-managed development. The program is a development of the United States, Germany and Italy.

Northrop Grumman Electronic Systems (NGES) was a business segment of Northrop Grumman from 1996 to 2015 until a reorganization on January 1, 2016 merged other Northrop Grumman businesses into NGES to form a new segment called Mission Systems. NGES had originally been created by Northrop Grumman's acquisition of Westinghouse Electronic Systems Group in 1996. The Electronic Systems sector was a designer, developer, and manufacturer of a wide variety of advanced defense electronics and systems. The division had 120 locations worldwide, including 72 international offices, and approximately 24,000 employees; accounting for 20% of company sales in 2005.

<span class="mw-page-title-main">AN/APG-66</span> Targeting radar designed for the F-16 aircraft

The AN/APG-66 radar is an X-band solid state medium range pulse-Doppler planar array radar originally designed by the Westinghouse Electric Corporation for use in early generations of the F-16 Fighting Falcon. Later F-16 variants use the AN/APG-68 or the AN/APG-83. This radar was employed in all domestic and export versions of the F-16A/B models throughout the production. Subsequent upgrades have been installed in many varying aircraft types including the U.S. Customs and Border Protection's C-550 Cessna Citation, US Navy P-3 Orion, and Piper PA-42 Cheyenne II's.

<span class="mw-page-title-main">AN/APG-63 radar family</span> Military aircraft all-weather multimode radar family

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<span class="mw-page-title-main">AN/APG-68</span> Radar system

The AN/APG-68 radar is a long range Pulse-doppler radar designed by Westinghouse to replace AN/APG-66 radar in the F-16 Fighting Falcon. After years of Service, AN/APG-68 radar currently being replaced on US Air Force F-16C/D Block 40/42 and 50/52 by the latest generation AN/APG-83 AESA radar.

<span class="mw-page-title-main">Active Phased Array Radar</span> Shipborne multi-function radar

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<span class="mw-page-title-main">AN/APG-77</span> Type of radar system

The AN/APG-77 is a multifunction low probability of intercept radar installed on the F-22 Raptor fighter aircraft. The radar was designed and initially built by Westinghouse and Texas Instruments, and production continued with their respective successors Northrop Grumman and Raytheon after acquisition.

The AN/APG-80 is an Active Electronically Scanned Array (AESA) system designed and manufactured by Northrop Grumman for use on the Lockheed Martin F-16 Fighting Falcon fighter aircraft. It was originally designed to be included on the F-16C/D Block 60 Desert Falcon aircraft ordered by the United Arab Emirates, subsequently reclassified as the F-16E/F Block 60 Desert Falcons; first deliveries were made in 2003.

<span class="mw-page-title-main">Mitsubishi X-2 Shinshin</span> Japanese experimental stealth aircraft

The Mitsubishi X-2 Shinshin is a Japanese experimental aircraft for testing advanced stealth fighter aircraft technologies. It is being developed by the Japanese Ministry of Defense Technical Research and Development Institute (TRDI) for research purposes. The main contractor of the project is Mitsubishi Heavy Industries. Many consider this aircraft to be Japan's first domestically made stealth fighter. ATD-X is an abbreviation for "Advanced Technology Demonstrator – X". The aircraft is widely known in Japan as Shinshin although the name itself is an early code name within the Japan Self-Defense Forces and is not officially in use. The aircraft's first flight was on 22 April 2016.

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The AN/APG-83 Scalable Agile Beam Radar (SABR) is a full-performance active electronically scanned array (AESA) fire control radar for the General Dynamics F-16 Fighting Falcon and other aircraft developed by Northrop Grumman. In a 2013 competition, Lockheed Martin selected SABR as the AESA radar for the F-16 modernization and update programs of the United States Air Force and Republic of China Air Force.

<span class="mw-page-title-main">AN/SPY-6</span> Active electronically scanned array radar

The AN/SPY-6 is an active electronically scanned array 3D radar under development for the United States Navy (USN). It will provide integrated air and missile defense for Flight III Arleigh Burke-class destroyers. Variants are under development for retrofitting Flight IIA Arleigh Burkes and for installation aboard Constellation-class frigates, Gerald R. Ford-class aircraft carriers, America-class amphibious assault ships, and San Antonio-class amphibious transport docks.

The Next Generation Jammer is a program to develop an airborne electronic warfare system, as a replacement for the AN/ALQ-99 found on the EA-18G Growler military aircraft. It reached Initial Operating Capability in 2021.

The AN/APG-85 is an active electronically scanned array (AESA) radar system designed by Northrop Grumman for the Lockheed Martin F-35 Lightning II. The AN/APG-85 is a further development of the AN/APG-81 and is planned to be installed in all three variants of the F-35 aircraft from Lot 17 and onwards, which are planned to enter production in 2025.

References

  1. "AN/APG-81 Active Electronically Scanned Array (AESA) Fire Control Radar". Northrop Grumman.
  2. "Hughes, Westinghouse picked for JAST multi-function array work". Aerospace Daily. McGraw-Hill. 15 February 1996.
  3. https://aviationweek.com/defense-space/sensors-electronic-warfare/weekly-debrief-f-35-program-sneaks-major-radar-upgrade
  4. "Elec Tricks: Turning AESA Radars into Broadband Comlinks". DefenseIndustryDaily.com. Retrieved 2 February 2017.
  5. "Northrop Grumman Successfully Completes F-22 Radar Flight-Test Certification". Irconnect.com. Retrieved 15 February 2012.
  6. 1 2 "Northrop Grumman's APG-81 Radar Sensor Performs Flawlessly on First Mission Systems Flight of Lockheed Martin F-35 Aircraft". Northrop Grumman Corp. 22 June 2010. Archived from the original on 23 January 2016. Retrieved 28 October 2015.
  7. Branch, Ricardo, Army Sgt. "Northern Edge fields new radar system." Archived 27 October 2013 at the Wayback Machine Northern Edge Joint Information Bureau, 8 March 2012.
  8. "Northrop Grumman Awarded DOD Honor for Electronic Protection Achievements." Quality Magazine, 17 November 2010
  9. Helfrich, Emma (3 January 2023). "F-35 Will Get New Radar Under Massive Upgrade Initiative". The Drive. Retrieved 4 January 2023.

See also