Radar
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Radar

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Radar Radar Presentation Transcript

  • RADAR TECHNOLOGY
  • RADARRadar (radio amplification detection and ranging) is anelectronic system for transmitting electromagnetic signalsand receiving echoes from objects of interest (targets).
  • HISTORY OF RADAR• Invented in1900s(Patentedin 1904)• Implemented inWorld war 2• Installed onships fordetecting enemy
  • HOW A RADAR WORKSTransmits anelectromagneticsignal modulatedwith particulartype of waveform.(modulationdepends onrequirements ofapplication)Signal is reflectedfrom targetReflected signal isdetected by radarreceiver andanalyzed to extractdesired information
  • TYPES OF RADARDetection and search radarsMissile guidance systemsBattlefield and reconnaissance radarAir Traffic Control and navigationSpace and range instrumentation radar systemsWeather-sensing Radar systemsRadars for biological research
  • Radar Frequency BandsFrequencyWavelength 1 mm1 km 1 m 1 m 1 nm1 MHz 1 GHzIR UV109 Hz0 1 2 3 4 5 6 7 8 9 10 11 1230 20 10 8 6 5 4 39 7Allocated Frequency (GHz)Wavelength (cm)X-BandC-BandS-BandL-BandUHFVHFVisible1012 HzKuKKaW
  • Target• Target range =c2where c = speed of light= round trip timeRADAR RANGE MEASUREMENT
  • RADAR APPLICATIONS• AIR TRAFFIC CONTROL• AIR NAVIGATION• REMOTE SENSING• MARINE• LAW ENFORCEMENT AND HIGHWAY SAFETY• SPACE• MILITARY
  • GENERIC RADAR SYSTEM
  • • Basic Radar Range Equation - Monostatic– Usually the same antenna is used for transmission andreception and we have the relationship between Gain andeffective area:–
  • LATEST TECHNOLOGIES IN RADAR• STEALTH• SYNTHETIC APERTURE RADAR• MTI RADARS• MESA TECHNOLOGY• AIRBORNE METHOD• SATELLITE BASED METHOD
  • FOR REDUCING RADAR DETECTION• The sea water is used to make the ships less detected as they are goodreflectors.
  • AIRBORNE METHOD• USEFUL TO DETECT ENEMY IN 3-D• THEY USE LIDAR• MADE TO FLY HIGH UP IN THE AIR
  • SATELLITE BASED METHOD• THE SATELLITE USE RADAR SENSORS• THEY COVER A WIDE AREA• THEY ARE MORE RELIEBLE AND SAFE
  • SURFACE BASED METHODS Radars of high sensitivity are used, like Radio Telescopes. They work good at all weather conditions. They use the concept of Radio-Astronomy. Requires heavy installations. The speed & trajectory of the enemy can be easily detected. Can detect he difference between hostile & Stealth crafts. Destroy the enemy with out their notice. Do not release radio signals.
  • STEALTH VEHICLES