Radar

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Rada System

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Radar

  1. 1. BITS Pilani Hyderabad Campus RADAR SYSTEM Mayank Garg 2013H140040H Embedded System BITS-Pilani, Hyderabad Campus
  2. 2. BITS Pilani, Hyderabad Campus Introduction History of Radar Principle of Operation Characteristics of radar Radar measurement capabilities Radar Range Measurement Types of Radar Classification by Primary Radar Mission Radar Wave Modulation Antenna’s Application’s Conclusion Mayank Garg Slide 2 CONTENTS
  3. 3. BITS Pilani, Hyderabad Campus  RADAR is an acronym for RAdio Detection And Ranging  RADAR is a method of using electromagnetic waves to remote-sense the position, velocity and identifying characteristics of targets. Introduction Mayank Garg Slide 3
  4. 4. BITS Pilani, Hyderabad Campus Radar was developed for military purposes during W. W. II. The British and US Military used radar to locate ships and airplanes. Mayank Garg Slide 4 History of Radar
  5. 5. BITS Pilani, Hyderabad CampusMayank Garg Slide 5
  6. 6. BITS Pilani, Hyderabad CampusMayank Garg Slide 6 Principle of Operation
  7. 7. BITS Pilani, Hyderabad CampusMayank Garg Slide 7 Characteristics of radar  Frequencies in the MHz, GHz, THz  Propagates at the speed of light  Antennas or optics used to launch/receive waves
  8. 8. BITS Pilani, Hyderabad CampusMayank Garg Slide 8 Presence of target (detection ) Range (distance and direction) Received signal strength Radial velocity (Doppler frequency shift) Radar measurement capabilities
  9. 9. BITS Pilani, Hyderabad CampusMayank Garg Slide 9
  10. 10. BITS Pilani, Hyderabad Campus  Pulse Transmission  Continuous Wave Mayank Garg Slide 10 Two Basic Radar Types
  11. 11. BITS Pilani, Hyderabad CampusMayank Garg Slide 11 Pulse Radar Components
  12. 12. BITS Pilani, Hyderabad CampusMayank Garg Slide 12 Pulse Diagram PRT PW Resting Time PRT=1/PRF Carrier Freq.
  13. 13. BITS Pilani, Hyderabad CampusMayank Garg Slide 13 Pulse Transmission Pulse Width (PW) – Length or duration of a given pulse Pulse Repetition Frequency (PRF) – Frequency at which consecutive pulse are transmitted Pulse Repetition Time (PRT=1/PRF) – Time from beginning of one pulse to the next – Inverse of PRF PW determines radar’s – Minimum detection range – Maximum detection range PRF determines radar’s – Maximum detection range
  14. 14. BITS Pilani, Hyderabad CampusMayank Garg Slide 14 Continuous Wave Radar Continual energy transmission Separate transmit/receive antennas Relies on “DOPPLER SHIFT”
  15. 15. BITS Pilani, Hyderabad Campus  Impedance Matching  Transmission Mayank Garg Slide 15 Continuous Wave Radar Components Discriminator AMP Mixer CW RF Oscillator Indicator OUT IN Transmitter Antenna Antenna
  16. 16. BITS Pilani, Hyderabad CampusMayank Garg Slide 16 Doppler Frequency Shifts
  17. 17. BITS Pilani, Hyderabad CampusMayank Garg Slide 17 Doppler Effect
  18. 18. BITS Pilani, Hyderabad CampusMayank Garg Slide 18 Pulse Vs. Continuous Wave
  19. 19. BITS Pilani, Hyderabad CampusMayank Garg Slide 19 Classification by Primary Radar Mission  Detection of Message Signal  Triggering The Rectenna  GSM Frequency In INDIA (900MHz Or 1800MHz) Search radars Weather Radar Tracking radars
  20. 20. BITS Pilani, Hyderabad Campus Amplitude Modulation Frequency Modulation Pulse-Amplitude Modulation Pulse-Frequency Modulation Mayank Garg Slide 20 RADAR Wave Modulation
  21. 21. BITS Pilani, Hyderabad Campus Introducing two types of antenna Parabolic Reflector Antenna Array antenna Mayank Garg Slide 21 Types of Antenna
  22. 22. BITS Pilani, Hyderabad CampusMayank Garg Slide 22 Parabolic Reflector Antenna
  23. 23. BITS Pilani, Hyderabad Campus An array antenna is composed of multiple element arrays for example, linear array, area array or nonformal array. The element antennas are half-wavelength dipoles, micro strip patches and wave guide slot. Mayank Garg Slide 23 Array Antenna
  24. 24. BITS Pilani, Hyderabad Campus Search RADAR Targeting RADAR Navigational RADAR Mapping RADAR Weather RADAR RADAR is used for Air Traffic Control Mayank Garg Slide 24 Applications
  25. 25. BITS Pilani, Hyderabad Campus Radar is a way to detect and study far off objects by transmitting a radio pulse in the direction of the target and observing the reflection of the wave. Its basically a radio echo. Mayank Garg Slide 25 Conclusion
  26. 26. BITS Pilani, Hyderabad Campus Thanks Mayank Garg Slide 26 Link to connect with author: http://www.slideshare.net/MayankGarg25 https://www.linkedin.com/in/gargmayank http://www.researchgate.net/profile/Mayank_Garg6/ https://www.facebook.com/mayank17692?ref=hl

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