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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 Organisation (DRDO). It is a low probability of intercept radar intended to be installed on the HAL Tejas Mark 1A, HAL Tejas Mark 2 and HAL TEDBF aircraft with plans to implement a larger and more powerful variant on-board India's 5th Generation fighter aircraft, the HAL AMCA. Description It is a liquid cooled AESA radar featuring quad band modules that can be stacked to form a larger unit. This allows the manufacturer to scale the radar to be used in larger aircraft. There are plan to create a larger scalable design to be used in India's fifth-generation HAL AMCA jet fighter. The radar development began in 2012 and its full-scale model was displayed at the 2017 Aero India air show and aviation exhibition. A fully functional AESA ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Active Electronically Scanned Array
An active electronically scanned array (AESA) is a type of phased array antenna, which is a computer-controlled array antenna 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 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electronic Warfare
Electronic warfare (EW) is any action involving the use of the electromagnetic spectrum (EM spectrum) or directed energy to control the spectrum, attack an enemy, or impede enemy assaults. The purpose of electronic warfare is to deny the opponent the advantage of—and ensure friendly unimpeded access to—the EM spectrum. EW can be applied from air, sea, land, and/or space by crewed and uncrewed systems, and can target communication, radar, or other military and civilian assets. The electromagnetic environment Military operations are executed in an information environment increasingly complicated by the electromagnetic spectrum. The electromagnetic spectrum portion of the information environment is referred to as the electromagnetic environment (EME). The recognized need for military forces to have unimpeded access to and use of the electromagnetic environment creates vulnerabilities and opportunities for electronic warfare in support of military operations. Within the informat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Active Phased Array Radar
Active Phased Array Radar (APAR) is a shipborne active electronically scanned array multifunction 3D radar (MFR) developed and manufactured by Thales Nederland. The radar receiver modules are developed and built in the US by the Sanmina Corporation. Characteristics APAR has four fixed (i.e., non-rotating) sensor arrays (faces), fixed on a pyramidal structure. Each face consists of 3424 transmit/receive (TR) modules operating at X band frequencies.Jane's Radar and Electronic Warfare Systems, 2007–2008 Edition, Edited by Martin Streetly, The radar provides the following capabilities: * air target tracking of over 200 targets out to 150 km * surface target tracking of over 150 targets out to 32 km * horizon search out to 75 km * "limited" volume search out to 150 km (in order to back up the volume search capabilities of the SMART-L) * cued search (a mode in which the search is cued using data originating from another sensor) * surface naval gunfire support ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mean Time Between Failures
Mean time between failures (MTBF) is the predicted elapsed time between inherent failures of a mechanical or electronic system during normal system operation. MTBF can be calculated as the arithmetic mean (average) time between failures of a system. The term is used for repairable systems while mean time to failure (MTTF) denotes the expected time to failure for a non-repairable system. The definition of MTBF depends on the definition of what is considered a failure. For complex, repairable systems, failures are considered to be those out of design conditions which place the system out of service and into a state for repair. Failures which occur that can be left or maintained in an unrepaired condition, and do not place the system out of service, are not considered failures under this definition. In addition, units that are taken down for routine scheduled maintenance or inventory control are not considered within the definition of failure. The higher the MTBF, the longer a system ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GaAs
Gallium arsenide (GaAs) is a III-V direct band gap semiconductor with a zinc blende crystal structure. Gallium arsenide is used in the manufacture of devices such as microwave frequency integrated circuits, monolithic microwave integrated circuits, infrared light-emitting diodes, laser diodes, solar cells and optical windows. GaAs is often used as a substrate material for the epitaxial growth of other III-V semiconductors, including indium gallium arsenide, aluminum gallium arsenide and others. Preparation and chemistry In the compound, gallium has a +3 oxidation state. Gallium arsenide single crystals can be prepared by three industrial processes: * The vertical gradient freeze (VGF) process. * Crystal growth using a horizontal zone furnace in the Bridgman-Stockbarger technique, in which gallium and arsenic vapors react, and free molecules deposit on a seed crystal at the cooler end of the furnace. * Liquid encapsulated Czochralski (LEC) growth is used for producing high-puri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solid-state (electronics)
Solid-state electronics means semiconductor electronics: electronic equipment using semiconductor devices such as transistors, diodes and integrated circuits (ICs). The term is also used as an adjective for devices in which semiconductor electronics that have no moving parts replace devices with moving parts, such as the solid-state relay in which transistor switches are used in place of a moving-arm electromechanical relay, or the solid-state drive (SSD) a type of semiconductor memory used in computers to replace hard disk drives, which store data on a rotating disk. History The term "solid-state" became popular at the beginning of the semiconductor era in the 1960s to distinguish this new technology based on the transistor, in which the electronic action of devices occurred in a solid state, from previous electronic equipment that used vacuum tubes, in which the electronic action occurred in a gaseous state. A semiconductor device works by controlling an electric current co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astra (missile)
Astra (Sanskrit: "weapon") is an Indian family of all weather beyond-visual-range air-to-air missile, developed by the Defence Research and Development Organisation. The missile is capable of engaging targets at varying ranges from a distance of up to . Astra Mk-1 has been integrated with Indian Air Force's Sukhoi Su-30MKI and will be integrated with Dassault Mirage 2000, HAL Tejas and Mikoyan MiG-29 in the future. Limited series production of Astra Mk-1 missiles began in 2017. Description Astra Mk-1 is long with a diameter of and weighs . It uses mid-course inertial guidance driven by fibre optic gyroscope with terminal guidance through active radar homing. It is capable of receiving course corrections through a secure data link. The missile's active radar seeker, with a homing range of , was designed by Russia's Concern Morinformsystem-Agat but manufactured within India. The seeker can lock-on to a target with a radar cross section of 5 square metres from a distanc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawker 800
The Hawker 800 is a mid-size twinjet corporate aircraft. It is a development of the British Aerospace BAe 125, and was assembled by Hawker Beechcraft. Development In April 1981, the British Aerospace board sanctioned the programme to improve the British Aerospace 125-700 series. By May 1983 the new aircraft was ready for its first test flight. The BAe 125-800 series has a number of modifications and changes over the 700, the most noticeable being the redesigned cockpit windscreen. Accompanying this are a modified rear fuselage fairing, as well as a glass cockpit and uprated (from 3,700 to 4,300 lb thrust) Garrett TFE731-5R-1H engines. British Aerospace also improved the wing by incorporating new outer wing sections. This helped to reduce drag and improve aerodynamic efficiency. The 125-800 series would become a sales success. From the first BAe 125 flight in August 1961 it took nineteen years until the 500th airframe was sold. In a little over five years, British Aerospac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Navy
The Indian Navy is the maritime branch of the Indian Armed Forces. The President of India is the Supreme Commander of the Indian Navy. The Chief of Naval Staff, a four-star admiral, commands the navy. As a blue-water navy, it operates significantly in the Persian Gulf Region, the Horn of Africa, the Strait of Malacca, and routinely conducts anti-piracy operations and partners with other navies in the region. It also conducts routine two to three month-long deployments in the South and East China seas as well as the western Mediterranean sea simultaneously. The primary objective of the navy is to safeguard the nation's maritime borders, and in conjunction with other Armed Forces of the union, act to deter or defeat any threats or aggression against the territory, people or maritime interests of India, both in war and peace. Through joint exercises, goodwill visits and humanitarian missions, including disaster relief, the Indian Navy promotes bilateral relations between n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Air Force
The Indian Air Force (IAF) is the air arm of the Indian Armed Forces. Its complement of personnel and aircraft assets ranks third amongst the air forces of the world. Its primary mission is to secure Indian airspace and to conduct aerial warfare during armed conflict. It was officially established on 8 October 1932 as an auxiliary air force of the British Empire which honoured India's aviation service during World War II with the prefix ''Royal''. After India gained independence from United Kingdom in 1947, the name Royal Indian Air Force was kept and served in the name of Dominion of India. With the government's transition to a Republic in 1950, the prefix ''Royal'' was removed. Since 1950, the IAF has been involved in four wars with neighbouring Pakistan. Other major operations undertaken by the IAF include Operation Vijay, Operation Meghdoot, Operation Cactus and Operation Poomalai. The IAF's mission expands beyond engagement with hostile forces, with the IAF particip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mikoyan MiG-29K
The Mikoyan MiG-29K (russian: Микоян МиГ-29K; NATO reporting name: Fulcrum-D) is a Russian all-weather carrier-based multirole fighter aircraft developed by the Mikoyan Design Bureau. The MiG-29K was developed in the late 1980s from the MiG-29M. Mikoyan describes it as a 4+ generation aircraft. Production standard MiG-29Ks differ from prototypes in features such as a multi-function radar and several new cockpit displays; the adoption of HOTAS (hands-on-throttle-and-stick) controls; the integration of RVV-AE (also known as R-77) air-to-air missiles, along with missiles for anti-ship and anti-radar operations; and several ground/strike precision-guided weapons. The MiG-29K was not ordered into production and only two prototypes were originally built because the Russian Navy preferred the Su-27K (later re-designated Su-33) in the early 1990s. Mikoyan did not stop its work on the MiG-29K aircraft despite the lack of financing since 1992. The programme got a boost in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sukhoi Su-30MKI
The Sukhoi Su-30MKI (NATO reporting name: Flanker-H) is a twinjet Multirole combat aircraft, multirole air superiority fighter developed by Russia's Sukhoi and built under licence by India's Hindustan Aeronautics Limited (HAL) for the Indian Air Force (IAF). A variant of the Sukhoi Su-30, it is a heavy, all-weather, long-range fighter. Development of the variant started after India signed a deal with Russia in 2000 to manufacture 140 Su-30 fighter jets. The first Russian-made Su-30MKI variant was accepted into the Indian Air Force in 2002, while the first Su-30MKI assembled in India entered service with the IAF in 2004. The IAF has nearly 260 Su-30MKIs in inventory as of January 2020. The Su-30MKI is expected to form the backbone of the Indian Air Force's fighter fleet to 2020 and beyond.Pandit, Rajat"Russia conducts first test of fifth generation Sukhoi." ''The Times of India'', 30 January 2010. The aircraft is tailor-made for Indian specifications and integrates Indian syste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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