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- History_of_radar abstract "The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell's seminal work on electromagnetism. However, it was not until the early 20th century that systems were able to use these principles were becoming widely available, and it was German inventor Christian Hülsmeyer who first used them to build a simple ship detection device intended to help avoid collisions in fog (Reichspatent Nr. 165546). Numerous similar systems, which provided directional information to objects over short ranges, were developed over the next two decades.The development of systems able to produce short pulses of radio energy was the key advance that allowed modern radar systems to come into existence. By timing the pulses on an oscilloscope the range could be determined, and the direction of the antenna revealed the angular location of the targets. The two, combined, produced a "fix", locating the target relative to the antenna. In the 1934–1939 period, eight nations developed independently, and in great secrecy, systems of this type: Great Britain, Germany, the United States, the USSR, Japan, the Netherlands, France, and Italy. In addition, Great Britain shared their information with the United States and four Commonwealth countries: Australia, Canada, New Zealand, and South Africa, and these countries also developed indigenous radar systems. During the war, Hungary was added to this list. The term RADAR was coined in 1939 by the United States Signal Corps as it worked on these systems for the Navy.Progress during the war was rapid and of great importance, probably one of the decisive factors for the victory of the Allies. A key development was the magnetron in the UK, which allowed the creation of relatively small systems with sub-meter resolution. By the end of hostilities Great Britain, Germany, the United States, the USSR, and Japan had a wide diversity of land- and sea-based radars as well as small airborne systems. After the war, radar use was widened to numerous fields including: civil aviation, marine navigation, radar guns for police, meteorology and even medicine. Key developments in the post-war period include the travelling wave tube as a way to produce large quantities of coherent microwaves, the development of signal delay systems that led to phased array radars, and ever-increasing frequencies that allow higher resolutions. Increases in signal processing capability due to the introduction of solid state computers has also had a large impact on radar use.".
- History_of_radar thumbnail CH_Radar_Mast_-_Stenigot_-_geograph.org.uk_-_150615.jpg?width=300.
- History_of_radar wikiPageExternalLink Holpp-The_Century_of_Radar.pdf.
- History_of_radar wikiPageExternalLink Huelspart1def.pdf.
- History_of_radar wikiPageExternalLink 2_02.htm.
- History_of_radar wikiPageExternalLink www.100-jahre-radar.de.
- History_of_radar wikiPageExternalLink othr.
- History_of_radar wikiPageExternalLink syllabus.htm.
- History_of_radar wikiPageExternalLink radar_pioneers.html.
- History_of_radar wikiPageExternalLink WNGER_Radar.htm.
- History_of_radar wikiPageExternalLink introduction.htm.
- History_of_radar wikiPageExternalLink radarhistorybuderi.html.
- History_of_radar wikiPageExternalLink www.purbeckradar.org.uk.
- History_of_radar wikiPageExternalLink www.radar-france.fr.
- History_of_radar wikiPageExternalLink www.radarpages.co.uk.
- History_of_radar wikiPageExternalLink AUACSC0609F97-3.pdf.
- History_of_radar wikiPageExternalLink index.htm.
- History_of_radar wikiPageExternalLink www.radarworld.org.
- History_of_radar wikiPageExternalLink index.html.
- History_of_radar wikiPageExternalLink radar_one_us.htm.
- History_of_radar wikiPageExternalLink www.secretsofradar.com.
- History_of_radar wikiPageExternalLink ttwiz.html.
- History_of_radar wikiPageID "1280053".
- History_of_radar wikiPageRevisionID "606807980".
- History_of_radar hasPhotoCollection History_of_radar.
- History_of_radar subject Category:Radar.
- History_of_radar subject Category:Radar_pioneers.
- History_of_radar comment "The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell's seminal work on electromagnetism.".
- History_of_radar label "Geschichte des Radars".
- History_of_radar label "Histoire du radar".
- History_of_radar label "History of radar".
- History_of_radar label "レーダーの歴史".
- History_of_radar sameAs Geschichte_des_Radars.
- History_of_radar sameAs Histoire_du_radar.
- History_of_radar sameAs レーダーの歴史.
- History_of_radar sameAs Q1517472.
- History_of_radar sameAs Q1517472.
- History_of_radar wasDerivedFrom History_of_radar?oldid=606807980.
- History_of_radar depiction CH_Radar_Mast_-_Stenigot_-_geograph.org.uk_-_150615.jpg.
- History_of_radar isPrimaryTopicOf History_of_radar.