ppt for the radar seminar

1. Technical seminar topic on:
RADAR COMMUNICATION
DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING
K. SIDDARTHA (21285A0405)
Presented by:

2. Content
▶ Introduction
▶ History
▶ What is Radar?
▶ Function of Radar
▶ Principle of Radar
▶ Types of Radar
▶ Advantages
▶ Disadvantages
▶ Applications
▶ Conclusion
▶Reference

3. Introduction
▶ Radar is an acronym for Radio DetectionAnd Ranging.
▶ Radar have become crucial in several major fields of research
and navigation.

4. History
▶ Radar was developed for military purposes during W. W. II. in 1942
▶ The British and US Military used radar to locate ships and
airplanes.
▶ Today, radar is an essential tool for predicting and analyzing
the weather.

5. What is Radar?
▶ RADAR (Radio Detection And Ranging) is a way to detect and
analyze far off targets by transmitting a radio pulse in the
direction of the target and observing the reflection of the wave.
▶ It’s basically radio echo.

6. Function of Radar
▶ RADAR is a method of using electromagnetic waves to remote-
sense the position, velocity and identifying characteristics of
targets.

7. Principle of Radar

8. Types of Radar

9. Pulsed Radar

10. Pulsed Radar Transmission
⚫ Pulse Width (PW)
⚫ Length or duration of a given pulse
⚫ Pulse Repetition Frequency (PRF)
⚫ Frequency at which consecutive pulse are transmitted in 1sec.
⚫ Pulse Repetition Time (PRT=1/PRF)
⚫ Time from beginning of one pulse to the next
⚫ Inverse of PRF

11. Continuous Wave Radar
▶ Continual energy transmission
▶ Separate transmit/receive antennas
▶ Depends on “DOPPLER SHIFT”

12. Continuous Wave Radar
Transmitter
Receiver Reflected energy
(contains information about
the reflecting object)

13. ▶The main advantage of RADAR, is that it provide superior penetration
capability through any type of weather condition, and can be used in
the day or night time.
▶ Wireless
▶ Stationary mode
▶Moving mode
▶It can detect more than one object.
Advantages

14. ▶ Time - Radar can take up to 2 seconds to lock on.
▶ Large targets close to radar can saturate receiver.
▶ It cannot resolve targets that are deep in the sea.
▶ Signals Interruption.
▶ It cannot recognize colour of the targets.
Disadvantages

15. Military applications Aircraft navigation
Applications
Ground traffic control

16. Ship navigation Remote sensing
Space

17. ▶ There are many improvements that we can make to our system in
order to create better results.
▶ We were able to detect the range for objects that were fairly close,
and calculate the velocity for objects moving extremely fast.
Conclusion

18. Reference
▶ www.google.com
▶ www.wikipedia.com

19. Thanks!