RADAR AND NAVIGATION IPU NOTES

RADAR AND NAVIGATION IPU NOTES :

ETEC- 419 SYLLABUS

UNIT -1

Introduction to Radar: Basic Radar -The Origins of Radar, radar system(block diagrams), Radar range Equation, Applications of Radar.

Radar types: MTI, Doppler and Pulse, PRF, Delay,Line Cancellers, Staggered Pulse Repetition Frequencies, Doppler Filter Banks, Digital MTI Processing, Moving Target Detector, Limitations to MTI Performance, Pulse Doppler Radar. Tracking with Radar-Monopulse Tracking, Conical Scan and Sequential Lobing, Limitations to Tracking Accuracy, Low -Angle Tracking- Tracking in Range, Comparison of Trackers, Automatic Tracking with Surveillance Radars.

UNIT -2

Radar Receiver: Introduction, Superheterodyne Receiver, Receiver noise Figure, Duplexers and Receiver Protectors, Radar Displays. Matched Filter Receiver, Detection Criteria, Detectors, Automatic Detector, Integrators, Constant-False-Alarrn Rate Receivers, The Radar operator, Signal Management, Propagation Radar Waves, Atmospheric Refraction, Standard propagation, Nonstandard Propagation, The Radar Antenna, Reflector Antennas, Electronically Steered Phased Array Antennas, Phase Shifters, Frequency-Scan Arrays.

UNIT - 3

Radar Transmitters- Introduction — Linear Beam Power - Solid State RF Power Sources - Magnetron - Crossed Field Amplifiers- Other RF Power Sources — Other aspects of Radar Transmitter.

Detection of Signals in Noise —Detection of Signals in Noise, Receiver Noise and the Signal-to-Noise Ratio, Probability Density Functions, Probabilities of Detection and False Alarm, Integration of Radar Pulses, Radar Cross Section of Targets, Radar cross Section fluctuations, Transmitter Power.

UNIT - 4

Navigation - Introduction, four methods of Navigation, Radio Direction finding, The loop Antenna, Loop input circuits, An Aural Null direction finder, The Goniometer, Errors in Direction finding, Adcock direction finders, Direction finding at very high frequencies, Automatic direction finders, The commutated Aerial Direction finder, Range and Accuracy of direction finders, Radio ranges, Doppler Navigation, component, Beam configurations, Track stabilization, introduction to satellite Navigation system.