29-03-2011, 11:13 AM
PRESENTED BY-
MAHESH KUMAR
seminar 8sem HBP.pptx (Size: 593.29 KB / Downloads: 401)
MILITARY RADAR
What is Radar?
RADAR (Radio Detection And Ranging) is a way to detect and study far off targets by transmitting a radio pulse in the direction of the target and observing the reflection of the wave.
RADAR
RAdio Detection And Ranging
Radar Range Measurement
INTRODUCTION
Military radar : Gather information
highly mobile
target synchronisation
weapon control
Features and Benifits
All Weather
Night Capability
Target Handling
Fast Reaction
Easy Operation
High Resolution
Linear/Circular polarized.
RADAR EQUATION
THE SYSTEM CONFIGURATION
Radar Group: antenna,remote control,AFC, interrogator
Shelter: display unit, PPI(plane position indicator), processor unit & battery
Motor generator: power supply
Terminal Equipment
T.D.R: target data receiver
Parallax correction
Threat evaluation
LINE CONNECTION ADAPTER:
receive data
2-wire telephone line
BLOCK DIAGRAM
SYSTEM FUNCTIONS
DETECTION: Moving target data displayed over PPI
TARGET TRACKING: Track of moving target
DECODING: Transmitted by VHF-FM/line comm.
Terminal equipment function
Equipment functions
TARGET DECODING:
Receive & Decode Inf.
PARALLAX CORRECTION: x-y to pollar coordinates
THREAT EVALUATION: Display azimuthal angle of threatning targets
FUNCTIONAL BLOCK DIAGRAM
Functional description
HT UNIT: main voltage to dc voltage
MAGNETRON: RF power generator
LO+AFC:
decide frequency of radar pulse
CONCEPT OF LOW PROBABILITY OF INTERCEPTION
Low probability of Interception (LPI) :
Is to see and not be seen.
Low enemy’s electronic counter-measures (ECM)
Use narrow main-lobe and extremely low side-lobes
DETECTION OF LANDMINES
The technology of ground penetrating radar uses Ultrawideband (UWB) techniques.
Detectburied landmines as small as 10 square cm
RADAR GUN
Antenna
PARABOLIC REFLECTOR:
rotating with a high speed. In the focus of the reflector is a radiator, which emits the pulses, and which receives the RF echo pulses.
In the waveguide is the polarization shifter, which causes the polarization of the RF energy to be either horizontally or circularly.
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.
CONCLUSION
Military radars are one of the most important requirements during the wartime
Used for early detection of ballistic missile and also for accurate target detection and firing.
Advises the weapon crew which target can be engaged first.
MAHESH KUMAR
seminar 8sem HBP.pptx (Size: 593.29 KB / Downloads: 401)
MILITARY RADAR
What is Radar?
RADAR (Radio Detection And Ranging) is a way to detect and study far off targets by transmitting a radio pulse in the direction of the target and observing the reflection of the wave.
RADAR
RAdio Detection And Ranging
Radar Range Measurement
INTRODUCTION
Military radar : Gather information
highly mobile
target synchronisation
weapon control
Features and Benifits
All Weather
Night Capability
Target Handling
Fast Reaction
Easy Operation
High Resolution
Linear/Circular polarized.
RADAR EQUATION
THE SYSTEM CONFIGURATION
Radar Group: antenna,remote control,AFC, interrogator
Shelter: display unit, PPI(plane position indicator), processor unit & battery
Motor generator: power supply
Terminal Equipment
T.D.R: target data receiver
Parallax correction
Threat evaluation
LINE CONNECTION ADAPTER:
receive data
2-wire telephone line
BLOCK DIAGRAM
SYSTEM FUNCTIONS
DETECTION: Moving target data displayed over PPI
TARGET TRACKING: Track of moving target
DECODING: Transmitted by VHF-FM/line comm.
Terminal equipment function
Equipment functions
TARGET DECODING:
Receive & Decode Inf.
PARALLAX CORRECTION: x-y to pollar coordinates
THREAT EVALUATION: Display azimuthal angle of threatning targets
FUNCTIONAL BLOCK DIAGRAM
Functional description
HT UNIT: main voltage to dc voltage
MAGNETRON: RF power generator
LO+AFC:
decide frequency of radar pulse
CONCEPT OF LOW PROBABILITY OF INTERCEPTION
Low probability of Interception (LPI) :
Is to see and not be seen.
Low enemy’s electronic counter-measures (ECM)
Use narrow main-lobe and extremely low side-lobes
DETECTION OF LANDMINES
The technology of ground penetrating radar uses Ultrawideband (UWB) techniques.
Detectburied landmines as small as 10 square cm
RADAR GUN
Antenna
PARABOLIC REFLECTOR:
rotating with a high speed. In the focus of the reflector is a radiator, which emits the pulses, and which receives the RF echo pulses.
In the waveguide is the polarization shifter, which causes the polarization of the RF energy to be either horizontally or circularly.
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.
CONCLUSION
Military radars are one of the most important requirements during the wartime
Used for early detection of ballistic missile and also for accurate target detection and firing.
Advises the weapon crew which target can be engaged first.