RADAR is acronym for Radio Detection and Ranging

1. MILITARY RADAR
GUIDED BY: PRESENTED BY:
AVILASHA B.G SRINIVASA GOWDA H.V
LECTURER
DEPT OF MECH ENGG.

2. CONTENTS
• INTRODUCTION
• PRINCIPLE AND WORKING OF BASIC RADAR
• RADAR RANGE EQUATION
• TYPES OF RADAR
• APPLICATIONS
• ADVANTAGES
• DISADVANTAGES
• CONCLUSION
• REFERENCE

3. INTRODUCTION
• RADAR is acronym for Radio Detection and Ranging.
• First successfully demonstrated in 1936.

4. PRINCIPLE OF WORKING OF BASIC RADAR

5. RADAR RANGE EQUATION
R max = [P t G б A e /(4П)2S min]1/4
G = 4ПAe / λ2
A e = Gλ2 / 4П
R max = [Pt Gλ2б / (4П)2 S min]1/4
Where: Pr = power received
Pt = power transmitted
G = antenna gain
б = radar cross section of target
A e = effective area

6. TYPES OF RADAR

7. PRIMARY RADAR
• CONTINUOUS WAVE RADAR
Continuous wave radars continuously transmit a high-frequency signal and the
reflected energy is also received and processed continuously
F o
f o
F o
± f d
0 d
f d
f d
CW Transmitter
Detector
( mixer )
Beat frequency
amplifier
I ndicator
T arget

8. • PULSE RADAR
Pulsed radar transmits high power, high-frequency pulses toward the target.

9. SECONDARY RADAR

10. APPLICATION OF RADAR IN DEFENCE FIELD
Air defense radars
Ground Surveillance Radar

11. Air Traffic Control Radar
Missile Control Radar Navigational based Radars

12. ADVANTAGES OF MILITARY RADARS
• All-weather day and night capability.
• Multiple target handling and engagement capability.
• Short and fast reaction time between target detection and ready to fire moment.
• Easy to operate and hence low manning requirements and stress reduction under
severe conditions
• Highly mobile system, to be used in all kind of terrain
• Flexible weapon integration, and unlimited number of single air defense weapons can
be provided with target data.

13. DISADVANTAGES
• Time - Radar can take up to 2 seconds to lock on
• Radar has wide beam spread (50 ft diameter over 200 ft range).
• Cannot track if deceleration is greater than one mph/second.
• Large targets close to radar can saturate receiver.
• Hand-held modulation can falsify readings.

14. CONCLUSION
• Military radars are one of the most important requirements during the wartime,
which can be used for early detection of ballistic missile and also for accurate target
detection and firing. Radar system discussed here has a built in threat evaluation
program which automatically puts the target in a threat sequence, and advises the
weapon crew which target can be engaged first.

15. REFERENCE
• [1] N.Padmaja1 Dr.S.Varadarajan2 R.Swathi3 ,’ SIGNAL PROCESSING OF
RADAR ECHOES USING WAVELETS AND HILBERT HUANG TRANSFORM ‘, Vol 2,
SEPT 2011.
• [2] R. Gabriel and F. Patrick. “ The Empirical Mode Decomposition Answers”.
IEEE Transactions on Signal Processing, vol. 56, No. 1, 2008

16. THANK YOU