3 - Basic Pulse RADAR & Contact Resolution

Question 1

Basic Pulse Radar

Answer 1

• 1 Antenna
• Cannot send and receive at the same time
• Uses a Duplexer to transmit and receive through the same antenna
• Bearing/Elevation from Beamwidth
• Waits for an echo

PW + RT = PRT

Question 2

Cross Range Resolution (R_cross)

Answer 2

Represents the angular resolution of the RADAR beam

Lower cross section = Increase accuracy

Question 3

How to resolve multiple contacts

Answer 3

• PW determines Range Resolution (R_res)
• Beamwidths and Range determine Azimuth and elevation resolution (R_cross)

Question 4

Range Resolution

Answer 4

If R_res is GREATER than Actual Separation, contacts will be seen as 1

If R_res is LESS than Actual Separation, contacts will be seen as 2 or more

Question 5

Cross Range Resolution (R_cross)

Answer 5

Minimum lateral separation or altitude between two targets at the same range

Dependent on:

• Shape of antenna
• Size of antenna
• Wavelength

If R_cross is GREATER than Actual Separation, CANNOT resolve contacts