Radar1

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Radar1

  1. 1. Welcome
  2. 2. RADAR By P.Sai kamal II yr ECE 10BA1A0443
  3. 3. Overview History What is radar ? Components Principle of operation Radar range measurement Radar equation Radar frequency bands Classification Applications Conclusion
  4. 4. HistoryHeinrich hertz-1886-radio waves reflectionHülsmeyer-1903-detection of radio wavesMarconi-1992-shortwaves radio detectionL.A Hyland-1930-Air craft detection
  5. 5. What is Radar? Radio Detection And Ranging
  6. 6. Components • Transmitter • Duplexer • Receiver
  7. 7. Principle of operation Antenna Propagation Target Cross Section Reflected Transmitted Pulse Pulse (“echo”) Radar observables: • Target range • Target angles (azimuth) • Target size • Target speed (Doppler) • Target features (imaging)
  8. 8. Radar equationThe power Pr returning to the receiving antenna isgiven by the equation: Pt = transmitter power Where Gt = gain of the transmitting antenna Ar = area of the receiving antenna σ = scattering coefficient of the target F = pattern propagation factor Rt = distance from transmitter to target Rr = distance from the target to the receiver.
  9. 9. Radar Frequency Bands
  10. 10. Block diagram of primary radar
  11. 11. Block diagram of pulse radar
  12. 12. CW-RadarTransmitterReceiver
  13. 13. ApplicationsAir traffic control Air craft navigation Military Ship safety Space Remote sensing
  14. 14. ApplicationsIncoherent Scatter Radar
  15. 15. INDIAN radar systems INDRA ROHINI
  16. 16. Modern radar updates5-10 cars from both directions Looks like traffic light
  17. 17. Modern radar updates Captures photos of crossing 100kms For motor vehicles
  18. 18. ConclusionRadar is a way to detect and study far off objectsBasically its a radio echo

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