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An active electronically scanned array (AESA) is a type of phased array antenna, which is a computer-controlled
array antenna An antenna array (or array antenna) is a set of multiple connected antennas which work together as a single antenna, to transmit or receive radio waves. The individual antennas (called ''elements'') are usually connected to a single receiver ...
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 In electronics and telecommunications, a radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna. The transmitter itself generates a radio frequency alternating current, which is applied to ...
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 Radar is a detection system that uses radio waves to determine the distance ('' ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, w ...
, and these are known as active phased array radar (APAR). The AESA is a more advanced, sophisticated, second-generation of the original PESA phased array technology. PESAs can only emit a single beam of radio waves at a single frequency at a time. The PESA must utilize a Butler matrix if multiple beams are required. The AESA can radiate multiple beams of radio waves at multiple frequencies simultaneously. AESA radars can spread their signal emissions across a wider range of frequencies, which makes them more difficult to detect over background noise, allowing ships and aircraft to radiate powerful radar signals while still remaining stealthy, as well as being more resistant to jamming. Hybrids of AESA and PESA can also be found, consisting of subarrays that individually resemble PESAs, where each subarray has its own RF front end. Using a hybrid approach, the benefits of AESA (e.g., multiple independent beams) can be realized at a lower cost compared to pure AESA.


History

Bell Labs Nokia Bell Labs, originally named Bell Telephone Laboratories (1925–1984), then AT&T Bell Laboratories (1984–1996) and Bell Labs Innovations (1996–2007), is an American industrial research and scientific development company owned by mult ...
proposed replacing the Nike Zeus radars with a phased array system in 1960, and was given the go-ahead for development in June 1961. The result was the Zeus Multi-function Array Radar (ZMAR), an early example of an active electronically steered array radar system. ZMAR became MAR when the Zeus program ended in favor of the Nike-X system in 1963. The MAR (Multi-function Array Radar) was made of a large number of small antennas, each one connected to a separate computer-controlled transmitter or receiver. Using a variety of beamforming and
signal processing Signal processing is an electrical engineering subfield that focuses on analyzing, modifying and synthesizing '' signals'', such as sound, images, and scientific measurements. Signal processing techniques are used to optimize transmissions, ...
steps, a single MAR was able to perform long-distance detection, track generation, discrimination of warheads from decoys, and tracking of the outbound interceptor missiles. MAR allowed the entire battle over a wide space to be controlled from a single site. Each MAR, and its associated battle center, would process tracks for hundreds of targets. The system would then select the most appropriate battery for each one, and hand off particular targets for them to attack. One battery would normally be associated with the MAR, while others would be distributed around it. Remote batteries were equipped with a much simpler radar whose primary purpose was to track the outgoing Sprint missiles before they became visible to the potentially distant MAR. These smaller Missile Site Radars (MSR) were passively scanned, forming only a single beam instead of the MAR's multiple beams. While MAR was ultimately successful, the cost of the system was enormous. When the ABM problem became so complex that even a system like MAR could no longer deal with realistic attack scenarios, the Nike-X concept was abandoned in favor of much simpler concepts like the Sentinel program, which did not use MAR. A second example, MAR-II, was abandoned in-place on Kwajalein Atoll. The first Soviet APAR, the 5N65, was developed in 1963-1965 as a part of the S-225 ABM system. After some modifications in the system concept in 1967 it was built at Sary Shagan Test Range in 1970-1971 and nicknamed Flat Twin in the West. Four years later another radar of this design was built on Kura Test Range, while the S-225 system was never commissioned. * The first military ground-based AESA was the J/FPS-3 which became fully operational with the 45th Aircraft Control and Warning Group of the
Japan Self-Defense Forces The Japan Self-Defense Forces ( ja, 自衛隊, Jieitai; abbreviated JSDF), also informally known as the Japanese Armed Forces, are the unified ''de facto''Since Article 9 of the Japanese Constitution outlaws the formation of Military, armed f ...
in 1995. * The first series production ship-based AESA was the OPS-24, a fire-control radar introduced on the Japanese ''Asagiri''-class destroyer DD-155 ''Hamagiri'' launched in 1988. * The first airborne series production AESA was the EL/M-2075 Phalcon on a Boeing 707 of the Chilean Air Force that entered service in 1994. * The first AESA on a combat aircraft was the J/APG-1 introduced on the Mitsubishi F-2 in 1995. * The first AESA on a missile is the seeker head for the AAM-4B, an air-to-air missile carried by the Mitsubishi F-2 and Mitsubishi-built McDonnell-Douglas F-15J. US based manufacturers of the AESA radars used in the F-22 and Super Hornet include Northrop Grumman and Raytheon. These companies also design, develop and manufacture the transmit/receive modules which comprise the 'building blocks' of an AESA radar. The requisite electronics technology was developed in-house via Department of Defense research programs such as MMIC Program. In 2016 the Congress funded a military industry competition to produce new radars for two dozen National Guard fighter aircraft.


Basic concept

Radar systems generally work by connecting an antenna to a powerful radio transmitter to emit a short pulse of signal. The transmitter is then disconnected and the antenna is connected to a sensitive receiver which amplifies any echos from target objects. By measuring the time it takes for the signal to return, the radar receiver can determine the distance to the object. The receiver then sends the resulting output to a display of some sort. The transmitter elements were typically klystron tubes or magnetrons, which are suitable for amplifying or generating a narrow range of frequencies to high power levels. To scan a portion of the sky, the radar antenna must be physically moved to point in different directions. Starting in the 1960s new
solid-state Solid state, or solid matter, is one of the four fundamental states of matter. Solid state may also refer to: Electronics * Solid-state electronics, circuits built of solid materials * Solid state ionics, study of ionic conductors and their ...
devices capable of delaying the transmitter signal in a controlled way were introduced. That led to the first practical large-scale passive electronically scanned array (PESA), or simply phased array radar. PESAs took a signal from a single source, split it into hundreds of paths, selectively delayed some of them, and sent them to individual antennas. The radio signals from the separate antennas overlapped in space, and the interference patterns between the individual signals were controlled to reinforce the signal in certain directions, and mute it in all others. The delays could be easily controlled electronically, allowing the beam to be steered very quickly without moving the antenna. A PESA can scan a volume of space much quicker than a traditional mechanical system. Additionally, thanks to progress in electronics, PESAs added the ability to produce several active beams, allowing them to continue scanning the sky while at the same time focusing smaller beams on certain targets for tracking or guiding semi-active radar homing missiles. PESAs quickly became widespread on ships and large fixed emplacements in the 1960s, followed by airborne sensors as the electronics shrank. AESAs are the result of further developments in solid-state electronics. In earlier systems the transmitted signal was originally created in a klystron or traveling wave tube or similar device, which are relatively large. Receiver electronics were also large due to the high frequencies that they worked with. The introduction of gallium arsenide microelectronics through the 1980s served to greatly reduce the size of the receiver elements until effective ones could be built at sizes similar to those of handheld radios, only a few cubic centimeters in volume. The introduction of JFETs and MESFETs did the same to the transmitter side of the systems as well. It gave rise to amplifier-transmitters with a low-power solid-state waveform generator feeding an amplifier, allowing any radar so equipped to transmit on a much wider range of frequencies, to the point of changing operating frequency with every pulse sent out. Shrinking the entire assembly (the transmitter, receiver and antenna) into a single "transmitter-receiver module" (TRM) about the size of a carton of milk and arraying these elements produces an AESA. The primary advantage of an AESA over a PESA is the capability of the different modules to operate on different frequencies. Unlike the PESA, where the signal is generated at single frequencies by a small number of transmitters, in the AESA each module generates and radiates its own independent signal. This allows the AESA to produce numerous simultaneous "sub-beams" that it can recognize due to different frequencies, and actively track a much larger number of targets. AESAs can also produce beams that consist of many different frequencies at once, using post-processing of the combined signal from a number of TRMs to re-create a display as if there was a single powerful beam being sent. However, this means that the noise present in each frequency is also received and added.


Advantages

AESAs add many capabilities of their own to those of the PESAs. Among these are: the ability to form multiple beams simultaneously, to use groups of TRMs for different roles concurrently, like radar detection, and, more importantly, their multiple simultaneous beams and scanning frequencies create difficulties for traditional, correlation-type radar detectors.


Low probability of intercept

Radar systems work by sending out a signal and then listening for its echo off distant objects. Each of these paths, to and from the target, is subject to the inverse square law of propagation in both the transmitted signal and the signal reflected back. That means that a radar's received energy drops with the fourth power of the distance, which is why radar systems require high powers, often in the megawatt range, to be effective at long range. The radar signal being sent out is a simple radio signal, and can be received with a simple radio receiver. Military aircraft and ships have defensive receivers, called "
radar warning receiver Radar warning receiver (RWR) systems detect the radio emissions of radar systems. Their primary purpose is to issue a warning when a radar signal that might be a threat is detected, like a fighter aircraft's fire control radar. The warning can t ...
s" (RWR), which detect when an enemy radar beam is on them, thus revealing the position of the enemy. Unlike the radar unit, which must send the pulse out and then receive its reflection, the target's receiver does not need the reflection and thus the signal drops off only as the square of distance. This means that the receiver is always at an advantage eglecting disparity in antenna sizeover the radar in terms of range - it will always be able to detect the signal long before the radar can see the target's echo. Since the position of the radar is extremely useful information in an attack on that platform, this means that radars generally must be turned off for lengthy periods if they are subject to attack; this is common on ships, for instance. Unlike the radar, which knows which direction it is sending its signal, the receiver simply gets a pulse of energy and has to interpret it. Since the radio spectrum is filled with noise, the receiver's signal is integrated over a short period of time, making periodic sources like a radar add up and stand out over the random background. The rough direction can be calculated using a rotating antenna, or similar passive array using phase or amplitude comparison. Typically RWRs store the detected pulses for a short period of time, and compare their broadcast frequency and pulse repetition frequency against a database of known radars. The direction to the source is normally combined with symbology indicating the likely purpose of the radar – airborne early warning and control,
surface-to-air missile A surface-to-air missile (SAM), also known as a ground-to-air missile (GTAM) or surface-to-air guided weapon (SAGW), is a missile designed to be launched from the ground to destroy aircraft or other missiles. It is one type of anti-aircraft syst ...
, etc. This technique is much less useful against a radar with a frequency-agile (solid state) transmitter. Since the AESA (or PESA) can change its frequency with every pulse (except when using doppler filtering), and generally does so using a random sequence, integrating over time does not help pull the signal out of the background noise. Moreover, a radar may be designed to extend the duration of the pulse and lower its peak power. An AESA or modern PESA will often have the capability to alter these parameters during operation. This makes no difference to the total energy reflected by the target but makes the detection of the pulse by an RWR system less likely. Nor does the AESA have any sort of fixed pulse repetition frequency, which can also be varied and thus hide any periodic brightening across the entire spectrum. Older generation RWRs are essentially useless against AESA radars, which is why AESAs are also known as ''low probability of intercept radars''. Modern RWRs must be made highly sensitive (small angles and bandwidths for individual antennas, low transmission loss and noise) and add successive pulses through time-frequency processing to achieve useful detection rates.


High jamming resistance

Jamming is likewise much more difficult against an AESA. Traditionally, jammers have operated by determining the operating frequency of the radar and then broadcasting a signal on it to confuse the receiver as to which is the "real" pulse and which is the jammer's. This technique works as long as the radar system cannot easily change its operating frequency. When the transmitters were based on klystron tubes this was generally true, and radars, especially airborne ones, had only a few frequencies to choose among. A jammer could listen to those possible frequencies and select the one to be used to jam. Most radars using modern electronics are capable of changing their operating frequency with every pulse. This can make jamming less effective; although it is possible to send out broadband white noise to conduct barrage jamming against all the possible frequencies, this reduces the amount of jammer energy in any one frequency. An AESA has the additional capability of spreading its frequencies across a wide band even in a single pulse, a technique known as a "chirp". In this case, the jamming will be the same frequency as the radar for only a short period, while the rest of the radar pulse is unjammed. AESAs can also be switched to a receive-only mode, and use these powerful jamming signals to track its source, something that required a separate receiver in older platforms. By integrating received signals from the targets' own radar along with a lower rate of data from its own broadcasts, a detection system with a precise RWR like an AESA can generate more data with less energy. Some receive beamforming-capable systems, usually ground-based, may even discard a transmitter entirely. However, using a single receiving antenna only gives a direction. Obtaining a range and a target vector requires at least two physically separate passive devices for
triangulation In trigonometry and geometry, triangulation is the process of determining the location of a point by forming triangles to the point from known points. Applications In surveying Specifically in surveying, triangulation involves only angle ...
to provide instantaneous determinations, unless phase interferometry is used. Target motion analysis can estimate these quantities by incorporating many directional measurements over time, along with knowledge of the position of the receiver and constraints on the possible motion of the target.


Other advantages

Since each element in an AESA is a powerful radio receiver, active arrays have many roles besides traditional radar. One use is to dedicate several of the elements to reception of common radar signals, eliminating the need for a separate radar warning receiver. The same basic concept can be used to provide traditional radio support, and with some elements also broadcasting, form a very high bandwidth data link. The F-35 uses this mechanism to send sensor data between aircraft in order to provide a synthetic picture of higher resolution and range than any one radar could generate. In 2007, tests by
Northrop Grumman Northrop Grumman Corporation is an American multinational aerospace and defense technology company. With 90,000 employees and an annual revenue in excess of $30 billion, it is one of the world's largest weapons manufacturers and military tec ...
, Lockheed Martin, and L-3 Communications enabled the AESA system of a Raptor to act like a WiFi access point, able to transmit data at 548 megabits per second and receive at gigabit speed; this is far faster than the Link 16 system used by US and allied aircraft, which transfers data at just over 1 Mbit/s. To achieve these high data rates requires a highly directional antenna which AESA provides but which precludes reception by other units not within the antennas beamwidth, whereas like most Wi-Fi designs, Link-16 transmits its signal omni-directionally to ensure all units within range can receive the data. AESAs are also much more reliable than either a PESA or older designs. Since each module operates independently of the others, single failures have little effect on the operation of the system as a whole. Additionally, the modules individually operate at low powers, perhaps 40 to 60 watts, so the need for a large high-voltage power supply is eliminated. Replacing a mechanically scanned array with a fixed AESA mount (such as on the
Boeing F/A-18E/F Super Hornet The Boeing F/A-18E and F/A-18F Super Hornet are twin-engine, carrier-capable, multirole fighter aircraft variants based on the McDonnell Douglas F/A-18 Hornet. The F/A-18E single-seat and F/A-18F tandem-seat variants are larger and more a ...
) can help reduce an aircraft's overall radar cross-section (RCS), but some designs (such as the Eurofighter Typhoon) forgo this advantage in order to combine mechanical scanning with electronic scanning and provide a wider angle of total coverage. This high off-nose pointing allows the AESA equipped fighter to employ a Crossing the T maneuver, often referred to as 'beaming' in the context of air-to-air combat, against a mechanically scanned radar that would filter out the low closing speed of the perpendicular flight as ground clutter while the AESA swivels 40 degrees towards the target in order to keep it within the AESA's 60 degree off-angle limit.


Limitations

With a half wavelength distance between the elements, the maximum beam angle is approximately \pm 45°. With a shorter element distance, the highest Field of View (FOV) for a flat phased array antenna is currently 120° (\pm 60°), although this can be combined with mechanical steering as noted above.


List of existing systems


Airborne systems

* Aselsan ** MURAD, for the Baykar Bayraktar Akıncı,
F-16 The General Dynamics F-16 Fighting Falcon is a single-engine multirole fighter aircraft originally developed by General Dynamics for the United States Air Force (USAF). Designed as an air superiority day fighter, it evolved into a successful ...
and TAI TF-X *
Northrop Grumman Northrop Grumman Corporation is an American multinational aerospace and defense technology company. With 90,000 employees and an annual revenue in excess of $30 billion, it is one of the world's largest weapons manufacturers and military tec ...
**
AN/APG-77 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 s ...
, for the F-22 Raptor ** AN/APG-80, for the F-16E/F Desert Falcon **
AN/APG-81 The AN/APG-81 is an active electronically scanned array (AESA) radar system designed by Northrop Grumman Electronic Systems for the Lockheed Martin F-35 Lightning II. The Joint Strike Fighter AN/APG-81 AESA radar is a result of the US government ...
, for the F-35 Lightning II ** AN/APG-83 SABR, for the F-16V Viper and B-1B Lancer upgrades. Option for KAI FA-50 Block 20 ** AN/APY-9, for the E-2D Advanced Hawkeye ** Multi-role Electronically Scanned Array (MESA radar), for the Boeing E-7 Wedgetail (AEW&C) aircraft ** AN/ASQ-236 Podded AESA Radar ** AN/ZPY-1 STARLite Small Tactical Radar - Lightweight, for manned and unmanned aircraft ** AN/ZPY-2 Multi-Platform Radar Technology Insertion Program (MP-RTIP) ** AN/ZPY-3 Multi-Function Active Sensor (MFAS) for MQ-4C Triton **Vehicle Dismount and Exploitation Radar (VADER) *
Raytheon Raytheon Technologies Corporation is an American multinational aerospace and defense conglomerate headquartered in Arlington, Virginia. It is one of the largest aerospace and defense manufacturers in the world by revenue and market capitaliz ...
** AN/APG-63(V)2 and AN/APG-63(V)3, for the F-15C Eagle, Republic of Singapore's F-15SG **
AN/APG-79 The AN/APG-79 is a variant of an active electronically scanned array (AESA) radar developed for the United States Navy's Boeing F/A-18E/F Super Hornet and Boeing EA-18G Growler aircraft, providing a high level of aircrew situational awareness. ...
, for the F/A-18E/F Super Hornet and EA-18G Growler ** AN/APG-82(V)1 for the F-15E Strike Eagle ** AN/APG-84 RACR (Raytheon Advanced Combat Radar) for F-16 and F/A-18 upgrades. Option for KAI FA-50 Block 20 ** AN/APQ-181 upgrade from PESA to AESA, for Northrop Grumman B-2 Spirit bomber ** AAS Advanced Airborne Sensor (AESA follow-on to the Littoral Surveillance Radar System (LSRS,
APS-149 The AN/APY-10 is an American multifunction radar developed for the U.S. Navy's Boeing P-8 Poseidon maritime patrol and surveillance aircraft. AN/APY-10 is the latest descendant of a radar family originally developed by Texas Instruments, and now R ...
also built by Raytheon), for the Boeing P-8 Poseidon ** Raytheon Sentinel ASTOR (Airborne STand-Off Radar) * Captor-E CAESAR (CAPTOR Active Electronically Scanning Array Radar) for the Eurofighter Typhoon * Selex ES (now Leonardo) ** PicoSAR ** Raven ES-05 AESA for the JAS-39E Gripen NG ** Seaspray 5000E ** Seaspray 7000E, for
helicopter A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally. These attribut ...
s ** Seaspray 7500E for
General Atomics MQ-9 Reaper The General Atomics MQ-9 Reaper (sometimes called Predator B) is an unmanned aerial vehicle (UAV) capable of remotely controlled or autonomous flight operations developed by General Atomics Aeronautical Systems (GA-ASI) primarily for the Uni ...
** Vixen 500E ** Vixen 1000E * Mitsubishi Electric Corporation ** J/APG-1 / J/APG-2 AESA for the Mitsubishi F-2 fighter ** HPS-104 for the Mitsubishi SH-60 **
Multifunction RF Sensor An MFP (multi-function product/printer/peripheral), multi-functional, all-in-one (AIO), or multi-function device (MFD), is an office machine which incorporates the functionality of multiple devices in one, so as to have a smaller footprint in a ...
for Mitsubishi ATD-X *
Thales Thales of Miletus ( ; grc-gre, Θαλῆς; ) was a Greek mathematician, astronomer, statesman, and pre-Socratic philosopher from Miletus in Ionia, Asia Minor. He was one of the Seven Sages of Greece. Many, most notably Aristotle, regard ...
** RBE2-AESA for Rafale fighter * Toshiba **HPS-106, air & surface search radar, for the Kawasaki P-1 maritime patrol aircraft, three antenna arrays. *
Ericsson (lit. "Telephone Stock Company of LM Ericsson"), commonly known as Ericsson, is a Sweden, Swedish multinational networking and telecommunications company headquartered in Stockholm. The company sells infrastructure, software, and services in ...
** Erieye AEW&C ** PS-05/A MK-5 for JAS 39 Gripen. ** EMB 145 AEW&C * Saab ** GlobalEye AEW&C, advanced version of the Erieye with extended range. * Phazotron NIIR ** Zhuk-A/AM, optional for MiG-35 * Tikhomirov NIIP **
N036 Byelka N036 Belka (russian: Белка, literally Squirrel) is an active electronically scanned array radar system developed by Tikhomirov NIIP for the fifth generation Sukhoi Su-57 fighter aircraft. Design The radar is a part of Sh121 multifunctional ...
, for Sukhoi Su-57 * Elta ** EL/M-2083 aerostat-mounted air search radar ** EL/M-2052, for fighters. Interim candidate for HAL Tejas. Suitable for F-15, MiG-29, Mirage 2000, FA-50 Block 20. ** EL/M-2075 radar for the
IAI , abbreviated , is a Japanese martial art that emphasizes being aware and capable of quickly drawing the sword and responding to sudden attacks.Christensen, Karen and Allen Guttmann et.al (2001) ''International Encyclopedia of Women and Sports ...
Phalcon AEW&C system ** EL/W-2085 advanced version of the radar for the EL/M-2075, used on the Gulfstream G550 ** EL/W-2090 similar to the EL/W-2085, only used on the Ilyushin Il-76 * NRIET (Nanjing Research Institute of Electronic Technology/14 institute), 607 institute, and 38 institute ** Radar for KJ-2000 AEW&C systemhttp://www.ausairpower.net/APA-PLA-AWACS-Programs.html PLA-AF Airborne Early Warning & Control Programs ** Radar for KJ-500 & Y-7 AWACS ** Radar for KJ-200 ** KLJ-7A for JF-17 Thunder Block 3 ** ZDK-03 ** Chengdu J-20
Type 1475 Radar The Chengdu J-20 (), also known as ''Mighty Dragon'' (), is a twinjet Night fighter, all-weather Stealth aircraft, stealth fighter aircraft developed by China's Chengdu Aircraft Industry Group, Chengdu Aerospace Corporation for the People's Li ...
** Chengdu J-10B/C ** Shenyang J-16 ** Z-8AEW * Defence Research and Development Organisation ** DRDO LSTAR - Radar for Airborne Early Warning platform. **
Uttam AESA Uttam is a solid-state gallium arsenide (GaAs) based active electronically scanned array (AESA) radar under development by the Electronics and Radar Development Establishment (LRDE), a laboratory of the Indian Defence Research and Development O ...
multifunction radar for HAL Tejas * Vega Radio Engineering Corporation - radar for
Vega Premier The Beriev A-100 is a Russian-built airborne early warning and control (AEW&C) aircraft based on the Il-76MD-90A transport aircraft. This aircraft is developed to replace the Beriev A-50 in Russian Air Force service. Avionics and configuration ...
* Hanwha Systems ** AESA radar for KAI KF-21 Boramae


Surface systems (land, maritime)

The first AESA radar employed on an operational warship was the Japanese OPS-24 manufactured by Mitsubishi Electric introduced on the JDS Hamagiri (DD-155), the first ship of the latter batch of the Asagiri-class destroyer, launched in 1988. * APAR (active phased array radar): Thales Netherlands' multifunction radar is the primary sensor of the Royal Netherlands Navy's De Zeven Provinciën class frigates, the German Navy's Sachsen class frigates, and the Royal Danish Navy's Ivar Huitfeldt class frigates. APAR is the first active electronically scanned array multifunction radar employed on an operational warship.Jane's Navy International, August 2010, "Expanding coverage from sea to sky" * BÜR - Bodenüberwachungsradar by Cassidian, for the
Bundeswehr The ''Bundeswehr'' (, meaning literally: ''Federal Defence'') is the armed forces of the Federal Republic of Germany. The ''Bundeswehr'' is divided into a military part (armed forces or ''Streitkräfte'') and a civil part, the military part con ...
* Cassidian ** TRS-4D ** COBRA Counter-battery radar * China ** Road-mobile "Anti-Stealth" JY-26 "Skywatch-U" 3-D long-range air surveillance radar. ** H/LJG-346(8) on Chinese aircraft carrier Liaoning ** H/LJG-346 on Type 052C destroyer ** H/LJG-346A on Type 052D destroyer ** H/LJG-346B on Type 055 destroyer ** Type 305A Radar (Acquisition radar for the HQ-9 missile system) ** YLC-2 Radar * Elta ** EL/M-2080 ''Green Pine'' ground-based early warning AESA radar ** EL/M-2106 ATAR air defense fire control radar ** EL/M-2180 - WatchR Guard Multi-Mode Staring Ground Surveillance Radar ** EL/M-2248 ''MF-STAR'' multifunction naval radar ** EL/M-2258 Advanced Lightweight Phased Array ''ALPHA'' multifunction naval radar ** EL/M-2084 multimission radar (artillery weapon location, air defence and fire control) ** EL/M-2133 ''WindGuard'' - ''Trophy'' active protection system radar * Hensoldt ** * Lockheed Martin ** AN/TPQ-53 Counterfire Target Acquisition Radar ** AN/SPY-7 Long Range Discrimination Radar ** AN/MPQ-64A4 Sentinel ** AN/TPY-4 3DELRR Three-Dimensional Expeditionary Long-Range Radar *
Northrop Grumman Northrop Grumman Corporation is an American multinational aerospace and defense technology company. With 90,000 employees and an annual revenue in excess of $30 billion, it is one of the world's largest weapons manufacturers and military tec ...
**
AN/TPS-80 The AN/TPS-80 Ground/Air Task Oriented Radar (G/ATOR) is the United States Marine Corps next-generation Air Surveillance/Air Defense and Air Traffic Control (ATC) Radar. The mobile active electronically scanned array radar system is currently bein ...
Ground/air task-oriented radar ( G/ATOR) ** HAMMR Highly Adaptable Multi-Mission Radar *
RADA Electronic Industries RADA Electronic Industries Ltd. is a global defense technology company focused on proprietary radar and legacy avionics systems. The company, which includes RADA Electronic Industries and its U.S-based subsidiaries, engages in the development, ...
** RPS-10 ** RPS-15 ** RPS-40 ** RPS-42 ** RHS-44 *
Raytheon Raytheon Technologies Corporation is an American multinational aerospace and defense conglomerate headquartered in Arlington, Virginia. It is one of the largest aerospace and defense manufacturers in the world by revenue and market capitaliz ...
** FlexDAR Flexible Distributed Array Radar ** U.S. National Missile defense Sea-based X-band Radar (XBR) ** AN/TPY-2 Anti-Ballistic Missile radar that can stand alone or be a part of the THAAD ABM system ** AN/SPY-3 multifunction radar for U.S. DD(X) and
CVN-21 The ''Gerald R. Ford'' class is a class of nuclear powered aircraft carriers currently being constructed for the United States Navy. The class, with a planned total of ten ships, will replace the Navy's current carriers on a one-for-one basis ...
next-generation surface vessels ** AN/SPY-6 Air and Missile Defense Radar (AMDR) multifunction radar for U.S. Arleigh Burke destroyers,
Gerald R. Ford-class aircraft carrier The ''Gerald R. Ford'' class is a class of nuclear powered aircraft carriers currently being constructed for the United States Navy. The class, with a planned total of ten ships, will replace the Navy's current carriers on a one-for-one basis ...
** Cobra Judy Replacement (CJR)/Cobra King on
USNS Howard O. Lorenzen (T-AGM-25) USNS ''Howard O. Lorenzen'' (T-AGM-25) is a Missile Range Instrumentation Ship built for the U.S. Navy by VT Halter Marine of Pascagoula, Mississippi. The keel was laid during a ceremony on August 13, 2008, and the vessel became operational in 20 ...
** AN/FPS-132 Upgraded Early Warning Radar (UEWR) - PAVE PAWS upgrade from PESA to AESA ** KuRFS * Saab Group ** GIRAFFE Radar:
GIRAFFE 1X The giraffe is a large African hoofed mammal belonging to the genus ''Giraffa''. It is the tallest living terrestrial animal and the largest ruminant on Earth. Traditionally, giraffes were thought to be one species, '' Giraffa camelopardal ...
,
GIRAFFE 4A The giraffe is a large African hoofed mammal belonging to the genus ''Giraffa''. It is the tallest living terrestrial animal and the largest ruminant on Earth. Traditionally, giraffes were thought to be one species, ''Giraffa camelopardalis ...
, GIRAFFE 8A * Selex ES ** KRONOS Land & Naval 3D multi-function radar ** RAN-40L 3D EWR ** RAT-31DL ** RAT-31DL/M *
ThalesRaytheonSystems Thales-Raytheon Systems Company LLC (ThalesRaytheonSystems or TRS) is an aerospace and defence company co-headquartered in Massy, Paris, France and Fullerton, California, United States. It is operated as a 50:50 joint venture between Raythe ...
**M3R *
Thales Thales of Miletus ( ; grc-gre, Θαλῆς; ) was a Greek mathematician, astronomer, statesman, and pre-Socratic philosopher from Miletus in Ionia, Asia Minor. He was one of the Seven Sages of Greece. Many, most notably Aristotle, regard ...
** Ground Master 200 ** Ground Master 400 ** Ground Master 200 MM ** SMART-L MM **
Sea Fire 500 The sea, connected as the world ocean or simply the ocean, is the body of salty water that covers approximately 71% of the Earth's surface. The word sea is also used to denote second-order sections of the sea, such as the Mediterranean Sea, ...
on FREMM-ER frigates ** Sea Master 400 **
Sea Watcher 100 The sea, connected as the world ocean or simply the ocean, is the body of water, body of saline water, salty water that covers approximately 71% of the Earth's surface. The word sea is also used to denote List of seas, second-order sections of ...
* Mitsubishi Electric Corporation ** Type 3 Chū-SAM Medium Range Surface-to-Air MissileSystem (Chu-SAM, SAM-4) multifunction radar ** OPS-24 (The world's first Naval Active Electronically Scanned Array radar) on Asagiri-class destroyers, Murasame-class destroyer (1994) and Takanami-class destroyers **
OPS-50 FCS-3 is an integrated naval weapons system developed by the Japanese Defense Ministry for the Japan Maritime Self-Defense Force. This system is composed of weapon-direction and fire-control subsystem and multi-function radar subsystem. The multi ...
( FCS-3) on the Hyūga-class helicopter destroyer, Izumo-class helicopter destroyer and
Akizuki-class destroyer (2010) The ''Akizuki'' class of destroyers of the Japan Maritime Self-Defense Force is intended to escort the and helicopter destroyers, and safeguard the other Aegis-capable warships such as the and . The destroyer provides defense against surface, ...
**J/FPS-3 Japanese main ground-based air defense ** J/FPS-5 Japanese ground-based next-generation missile defense radar **JTPS-P14 Transportable air defence radar **JTPS-P16 Counter-battery radar * Toshiba **J/FPS-4 Cheaper than J/FPS-3, produced by Toshiba **JMPQ-P13 Counter-battery radar, Toshiba * MEADS's fire control radar * BAE Systems ** SAMPSON multifunction radar for the UK's Type 45 destroyers **
ARTISAN An artisan (from french: artisan, it, artigiano) is a skilled craft worker who makes or creates material objects partly or entirely by hand. These objects may be functional or strictly decorative, for example furniture, decorative art, ...
Type 997 multifunction radar for the UK's Type 23 and Type 26 Frigates and the Queen Elizabeth class aircraft carriers * J/TPS-102 Self-propelled ground-based radar, cylindrical array antenna, NEC * CEA Technologies ** CEAFAR a 4th generation, S-Band multifunction digital active phased array radar, installed on all RAN ANZAC class frigates. * NNIIRT 1L119 Nebo SVU mobile AESA 3-dimensional surveillance radar * VNIIRT Gamma DE mobile 3-dimensional solid-state AESA surveillance radar * 50N6A multifunctional radar of the Vityaz missile system and 42S6 "
Morfey 42S6 Morfey or Morfei (''Морфей'' after the god of dreams in Greek mythology Morpheus) with missile 9M338K or RZV-MD based and derived from Tor-M2, is a short range air defense system currently being developed for the Russian Armed Forces ...
" ("Morpheus") *
National Chung-Shan Institute of Science and Technology National Chung-Shan Institute of Science and Technology (NCSIST; ) is a Taiwanese state owned corporation, formerly part of the Republic of China Ministry of National Defense's Armaments Bureau, which is active in the development, manufacturin ...
** CS/MPQ-90 Bee Eye - multifunction radar ** CS/SPG-6N - naval radar with surface search and fire control variants * Defence Research and Development Organisation **
Ashwini LLTR Radar Ashwini, Ashvini or Asvini may refer to: *Ashvini, the first nakshatra (lunar mansion) of Hindu astrology * ''Ashwini'' (film), a 1991 Telugu film People * Ashwini (actress) (1967–2012), Indian Tamil-Telugu actress * Ashwini Akkunji (born 1987) ...
- 4D AESA radar (used by Indian Air Force). ** Arudhra Radar- Multi function AESA radar (used by Indian Air Force). ** Swordfish Long Range Tracking Radar- Target acquisition and fire control radar for Indian Ballistic Missile Defence system. ** Air Defence Tactical Control Radar (ADTCR) - Tactical control radar. ** Atulya Air Defence Fire Control Radar (ADFCR) - X-band, 3D Fire control radar. * Bharat Electronics ** RAWL-03 - Multi Function Active phased array Air Surveillance Radar. ** Naval Missile Defense Radar (NMDR) - S-Band Multi Function Active phased array Radar. * Larsen & Toubro ** Air Defence Fire Control Radar System- 3D surveillance radar. * LIG Nex1 **
SPS-550K The AN/SPS-55 is a solid state surface search and navigation radar. It was developed by Cardion Electronics for the U.S. Navy under a contract awarded in 1971. It was originally developed for a class of ships known as Patrol Frigates, but it was ...
medium-range air and surface surveillance radar for Incheon-class frigates and Daegu-class frigates


See also

* Radar configurations and types * Receiver * Passive electronically scanned array * Low Probability of Intercept Radar * Terrain-following radar *
Solid State Phased Array Radar System The Solid State Phased Array Radar System (SSPARS, colloquially "BMEWS radar network'" as late as 2004) is a United States Space Force radar, computer, and communications system for missile warning and space surveillance "at five (5) geographical ...


References


Bibliography

*


External links


Active Electronically Steered Arrays – A Maturing Technology
(ausairpower.net)

(flug-revue.rotor.com)
Phased Arrays and Radars – Past, Present and Future
(mwjournal.com) {{commons category, Active electronically scanned arrays Radar