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
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CONTENTS
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
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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.
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History of Radar
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. 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
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. BITS Pilani, Hyderabad CampusMayank Garg Slide 14
Continuous Wave Radar
Continual energy transmission
Separate transmit/receive antennas
Relies on “DOPPLER SHIFT”
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
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.
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Array Antenna
24. BITS Pilani, Hyderabad Campus
Search RADAR
Targeting RADAR
Navigational RADAR
Mapping RADAR
Weather RADAR
RADAR is used for Air Traffic Control
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Applications
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.
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Conclusion
26. BITS Pilani, Hyderabad Campus
Thanks
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