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Radar Principles & Systems
Learning Objectives
A. The student will comprehend the basic operation of a simple pulse radar system.
B. The student will know the following terms: pulse width, pulse repetition frequency, carrier frequency, peak power, average power, and duty cycle.
C. The student will know the block diagram of a simple pulse radar system and will comprehend the major components of that system.
D. The student will comprehend the basic operation of a simple continuous wave radar system.
E. The student will comprehend the concept of doppler frequency shift.
F. The student will know the block diagram of a simple continuous wave radar system and will comprehend the major components of that system, including amplifiers, power amplifiers, oscillators, and waveguides.
G. The student will comprehend the use of filters in a continuous wave radar system.
H. The student will know the fundamental means of imparting information to radio waves and will comprehend the uses, advantages, and disadvantages of the various means.
I. The student will comprehend the function and characteristics of radar/radio antennas and beam formation.
J. The student will comprehend the factors that affect radar performance.
K. The student will comprehend frequency modulated CW as a means of range determination.
L. The student will comprehend the basic principles of operation of pulse doppler radar and MTI systems.
Two Basic Radar Types
u Pulse Transmission
u Continuous Wave
Pulse Transmission
u Pulse Width (PW)
u Length or duration of a given pulse
u Pulse Repetition Time (PRT=1/PRF)
u PRT is time from beginning of one pulse to the beginning of the next
u PRF is frequency at which consecutive pulses are transmitted.
u PW can determine the radar’s minimum detection range; PW can determine the radar’s maximum detection range.
u PRF can determine the radar’s maximum detection range.
D. Describe the components of a pulse radar system.
u 1. Synchronizer
u 2. Transmitter
u 3. Antenna
u 4. Duplexer
u 5. Receiver
u 6. Display unit
u 7. Power supply
Continuous Wave Radar
u Employs continual RADAR transmission
u Separate transmit and receive antennas
u Relies on the “DOPPLER SHIFT”