Download - Radar Technology by Premavani Rajendra
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We can learn many things from nature…
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BATS - ECHOLOCATION
Bats are nocturnal animals
But they have very poor eyesight
They detect their prey/obstacles by echolocation
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RADAR
TECHNOLOGY
Presented by
Mrs. Premavani Rajendra
Lecturer, Dept of Electronics,
Govt. Science College, Tumkur
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What is a RADAR ? RADAR :RAdio Detection And
Ranging It is an electromagnetic
system for the detection and location of reflecting objects, such as aircraft, ships, spacecrafts, vehicles, people and the natural environment.
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Invention of RADAR In 1887, a physicist named Heinrich Hertzbegan experimenting with radio waves in his laboratoryin Germany
Sir Robert Alexander
Watson-Watt (1892-1973):
Scottish physicist who developed the radar locating of aircraft in England.
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Principle of Operation
A transmitter radiates electromagnetic signal into space by an antenna.
A portion of the transmitted
energy is intercepted by the target and re-radiated into many directions.
The re-radiation directed back towards the Radar is collected by the Radar Antenna which delivers it to a receiver.
There it is processed to detect the presence of the target and determine its location
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RADAR Operation … EM waves are transmitted at the
target and echo waves are monitored.
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Block Diagram of RADAR
Courtesy: Introduction to Radar – Merill Skolnik 3rd Edn
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Radar Mixer
Radar Magnetron
Radar Antenna
Radar Amplifier
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Primitive RADARS
This was the first surveillance radar system designed to detect objects in space by Federation of American Scientists (FAS)
Decca 41 – First Weather detecting Radar of Hong Kong Observatory in 1959
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First Defense RADAR RADAR Monitoring Screen
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TYPES OF RADARSurveillance Radar includes target detection, target recognition, target tracking and designation to a weapon system
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Weapon –Control Radars track targets, direct the weapon to an intercept and asses the effectiveness of the battle damage assessment.
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A Missile System Radar might employ Radar methods for guidance and fusing of the weapon
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High resolution Imaging Radars, such as synthetic aperture Radar have been used for reconnaissance purposes and for detecting fixed and moving targets on the battle field.
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Airborne Radars are mounted on the aero planes that allow the pilot to avoid hazardous weather conditions.
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APPLICATIONS OF RADAR
Military: In air defense it performs the functions of surveillance and weapon control.
Remote Sensing: All Radars are remote sensors. They are used for weather observation, planetary observation, short range below-ground probing and mapping of sea ice to route shipping.
Air Traffic Control: They safely control the air traffic in the vicinity of airports as well as ground aircraft traffic.
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Law Enforcement & Highway safety: The Radar speed meter is used by police for enforcing speed limits.
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Space: Space vehicles use Radar for rendezvous and docking and landing on moon. They are employed for planetary exploration.
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Entomologists & Ornithologists have applied Radar for the study of movements of insects and birds which cannot be easily achieved by other means.
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