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The Eurofighter Typhoon combat aircraft with its nose fairing removed, revealing its Euroradar CAPTOR AESA radar antenna
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.[1] 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 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.
^The Insane Engineering of the F-35B, retrieved 2024-02-16
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An activeelectronicallyscannedarray (AESA) is a type of phased array antenna, which is a computer-controlled antenna array in which the beam of radio...
passive electronicallyscannedarray (PESA), also known as passive phased array, is an antenna in which the beam of radio waves can be electronically steered...
In antenna theory, a phased array usually means an electronicallyscannedarray, a computer-controlled array of antennas which creates a beam of radio...
Multirole Solid State ActiveArray Radar (AMSAR) project which eventually produced the CAESAR (Captor ActiveElectronicallyScannedArray Radar), now known...
developed by Saab Electronic Defence Systems (formerly Ericsson Microwave Systems) of Sweden. It uses activeelectronicallyscannedarray (AESA) technology...
is M85 "Žirafa". Saab Electronic Defence Systems (EDS) in May 2014 unveiled two new classes of activeelectronicallyscannedarray (AESA) radar—three land-based...
company, Thales Group. The RBE2 is a passive electronicallyscannedarray (PESA), an electronicallyscanned radar with a single transmitter. Flight trials...
Uttam is a solid-state gallium arsenide (GaAs) based activeelectronicallyscannedarray (AESA) radar under development by the Electronics and Radar Development...
The SAMPSON is a multi-function dual-face activeelectronicallyscannedarray radar produced by BAE Systems Maritime. It is the fire control radar component...
system known as Quick Kill detects incoming threats using an ActiveElectronicallyScannedArray, which assesses the threat, and deploys a smaller rocket...
2015. LRDR is a gallium nitride (GaN)-based, solid-state activeelectronicallyscannedarray (AESA) early-warning radar that allows for continuous coverage...
The Type 346 radar (NATO/OSD Dragon Eye) is a naval S band activeelectronicallyscannedarray (AESA) radar developed in the People's Republic of China...
revolver-type, vertical launching system (VLS) and has flat-paneled activeelectronicallyscannedarray (AESA) radar. The new VLS is not limited to surface-to-air...
another name for a Yagi–Uda antenna. A phased array usually means an electronicallyscannedarray; a driven array antenna in which each individual element...
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