Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Passive_electronically_scanned_array> ?p ?o }
- Passive_electronically_scanned_array abstract "A passive electronically scanned array (PESA), also known as passive phased array is a phased array radar which has a single central radio frequency source (such as a magnetron, a klystron or a travelling wave tube), sending energy into the multiple phase shift modules, which then send energy into the individual emitting elements in the front of the antenna. This contrasts with active electronically scanned array (AESA) devices, which have a separate radio frequency source for each phase shifter/emitting element. A PESA radar is therefore simpler to construct than an AESA.Most phased array radars in the world are PESA. Microwave landing system uses PESA transmit-only arrays.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 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, 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 was 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.".
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- Passive_electronically_scanned_array wikiPageRevisionID "668781441".
- Passive_electronically_scanned_array wikiPageWikiLink APG-76.
- Passive_electronically_scanned_array wikiPageWikiLink APQ-164.
- Passive_electronically_scanned_array wikiPageWikiLink APQ-181.
- Passive_electronically_scanned_array wikiPageWikiLink APY-1.
- Passive_electronically_scanned_array wikiPageWikiLink APY-7.
- Passive_electronically_scanned_array wikiPageWikiLink FPQ-16.
- Passive_electronically_scanned_array wikiPageWikiLink FPQ-16_PARCS.
- Passive_electronically_scanned_array wikiPageWikiLink MPQ-53.
- Passive_electronically_scanned_array wikiPageWikiLink MPQ-65.
- Passive_electronically_scanned_array wikiPageWikiLink SPQ-11.
- Passive_electronically_scanned_array wikiPageWikiLink SPY-1.
- Passive_electronically_scanned_array wikiPageWikiLink TPQ-36.
- Passive_electronically_scanned_array wikiPageWikiLink TPQ-36_Firefinder_radar.
- Passive_electronically_scanned_array wikiPageWikiLink TPQ-37.
- Passive_electronically_scanned_array wikiPageWikiLink TPQ-37_Firefinder_radar.
- Passive_electronically_scanned_array wikiPageWikiLink ARTHUR_(radar).
- Passive_electronically_scanned_array wikiPageWikiLink Active_electronically_scanned_array.
- Passive_electronically_scanned_array wikiPageWikiLink Aegis_Combat_System.
- Passive_electronically_scanned_array wikiPageWikiLink Aegis_combat_system.
- Passive_electronically_scanned_array wikiPageWikiLink Antenna_(radio).
- Passive_electronically_scanned_array wikiPageWikiLink B-1_Lancer.
- Passive_electronically_scanned_array wikiPageWikiLink B-2_Spirit.
- Passive_electronically_scanned_array wikiPageWikiLink Bars_radar.
- Passive_electronically_scanned_array wikiPageWikiLink Boeing_E-3_Sentry.
- Passive_electronically_scanned_array wikiPageWikiLink Category:Radar.
- Passive_electronically_scanned_array wikiPageWikiLink Cavalier_Air_Force_Station.
- Passive_electronically_scanned_array wikiPageWikiLink Cavity_magnetron.
- Passive_electronically_scanned_array wikiPageWikiLink Dassault_Rafale.
- Passive_electronically_scanned_array wikiPageWikiLink M-2026.
- Passive_electronically_scanned_array wikiPageWikiLink Irbis-E.
- Passive_electronically_scanned_array wikiPageWikiLink Irbis_radar.
- Passive_electronically_scanned_array wikiPageWikiLink Klystron.
- Passive_electronically_scanned_array wikiPageWikiLink Klystron_tube.
- Passive_electronically_scanned_array wikiPageWikiLink MIG-31.
- Passive_electronically_scanned_array wikiPageWikiLink MIM-104_Patriot.
- Passive_electronically_scanned_array wikiPageWikiLink Magnetron.
- Passive_electronically_scanned_array wikiPageWikiLink Microwave_landing_system.
- Passive_electronically_scanned_array wikiPageWikiLink Mikoyan_MiG-31.
- Passive_electronically_scanned_array wikiPageWikiLink Northrop_Grumman.
- Passive_electronically_scanned_array wikiPageWikiLink Northrop_Grumman_B-2_Spirit.
- Passive_electronically_scanned_array wikiPageWikiLink Northrop_Grumman_E-8_Joint_STARS.
- Passive_electronically_scanned_array wikiPageWikiLink OPS-12.
- Passive_electronically_scanned_array wikiPageWikiLink PARCS_(radar).
- Passive_electronically_scanned_array wikiPageWikiLink Phase_shift_module.
- Passive_electronically_scanned_array wikiPageWikiLink Phased_array.
- Passive_electronically_scanned_array wikiPageWikiLink RBE2.
- Passive_electronically_scanned_array wikiPageWikiLink Radar.
- Passive_electronically_scanned_array wikiPageWikiLink Radar_display.
- Passive_electronically_scanned_array wikiPageWikiLink Radio_frequency.
- Passive_electronically_scanned_array wikiPageWikiLink Rafale.
- Passive_electronically_scanned_array wikiPageWikiLink Rajendra_Radar.
- Passive_electronically_scanned_array wikiPageWikiLink Receiver_(radio).
- Passive_electronically_scanned_array wikiPageWikiLink Rockwell_B-1_Lancer.
- Passive_electronically_scanned_array wikiPageWikiLink S-300_(missile).
- Passive_electronically_scanned_array wikiPageWikiLink SA-10.
- Passive_electronically_scanned_array wikiPageWikiLink Semi-active_radar_homing.
- Passive_electronically_scanned_array wikiPageWikiLink Solid-state_electronics.
- Passive_electronically_scanned_array wikiPageWikiLink Solid_state_(electronics).
- Passive_electronically_scanned_array wikiPageWikiLink Sukhoi_Su-30MKI.
- Passive_electronically_scanned_array wikiPageWikiLink Sukhoi_Su-34.
- Passive_electronically_scanned_array wikiPageWikiLink Sukhoi_Su-35.
- Passive_electronically_scanned_array wikiPageWikiLink Sukhoi_Su-35BM.
- Passive_electronically_scanned_array wikiPageWikiLink TRML-3D.
- Passive_electronically_scanned_array wikiPageWikiLink Transmitter.
- Passive_electronically_scanned_array wikiPageWikiLink Traveling-wave_tube.
- Passive_electronically_scanned_array wikiPageWikiLink Travelling_wave_tube.
- Passive_electronically_scanned_array wikiPageWikiLink VSHORAD.
- Passive_electronically_scanned_array wikiPageWikiLink Westinghouse_Electric_(1886).
- Passive_electronically_scanned_array wikiPageWikiLink Westinghouse_Electric_Corporation_(1886).
- Passive_electronically_scanned_array wikiPageWikiLink Zaslon.
- Passive_electronically_scanned_array wikiPageWikiLink File:DN-ST-92-02246.JPEG.
- Passive_electronically_scanned_array wikiPageWikiLinkText "PESA radar".
- Passive_electronically_scanned_array wikiPageWikiLinkText "PESA".
- Passive_electronically_scanned_array wikiPageWikiLinkText "Passive electronically scanned array".
- Passive_electronically_scanned_array wikiPageWikiLinkText "Passive phased array radar".
- Passive_electronically_scanned_array wikiPageWikiLinkText "beams are electronically steered".
- Passive_electronically_scanned_array wikiPageWikiLinkText "electronically scanned".
- Passive_electronically_scanned_array wikiPageWikiLinkText "electronically steered".
- Passive_electronically_scanned_array wikiPageWikiLinkText "passive electronically scanned array (PESA) radar".
- Passive_electronically_scanned_array wikiPageWikiLinkText "passive electronically scanned array radar".
- Passive_electronically_scanned_array wikiPageWikiLinkText "passive electronically scanned array".
- Passive_electronically_scanned_array wikiPageWikiLinkText "passive electronically scanned multi-mode radar".
- Passive_electronically_scanned_array wikiPageWikiLinkText "passive electronically scanned".
- Passive_electronically_scanned_array wikiPageWikiLinkText "passive phased array radar".
- Passive_electronically_scanned_array wikiPageWikiLinkText "passive phased array".
- Passive_electronically_scanned_array wikiPageWikiLinkText "passive phased radar".
- Passive_electronically_scanned_array wikiPageWikiLinkText "passive phased-array radar".
- Passive_electronically_scanned_array wikiPageWikiLinkText "passive scanning".
- Passive_electronically_scanned_array wikiPageWikiLinkText "phase-frequency electronic scanning technology".
- Passive_electronically_scanned_array wikiPageWikiLinkText "phased array antenna".
- Passive_electronically_scanned_array wikiPageWikiLinkText "phased array radar".
- Passive_electronically_scanned_array hasPhotoCollection Passive_electronically_scanned_array.
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