6 - Optimizing RADAR Detection

Question 1

Pulse RADAR Detection Ranges

Answer 1

Detectable return:

1. Range >_ R_min
2. Range_< R_max
3. Range_< R_OTH

Correct target:

1. Range_< R_OTH

Question 2

Maximum Detection Range of R_unamb

Answer 2

Dependent on PRF only

Question 3

Maximum Detection Range of R_max

Answer 3

• Assumes nothing blocks propagation
• Depends on RADAR, target characteristics, and spreading

Question 4

Maximum Detection Range of R_OTH

Answer 4

• Assumes signal is strong enough to propagate out and back
• Depends on H_R, H_T, curvature of the Earth, and bending of radio waves

Question 5

Relationship of R_max, S_min, and P_received

Answer 5

S_min is the minimum P_receieved required by the RADAR to detect a return signal.

The max range that a return signal can be detected occurs when S_min = P_received

Question 6

Receiver Sensitivity

Answer 6

Small S_min is desirable

• Higher sensitivity
• Increased detection ability
• Increased Range

Lower Sensitivity = Lower S_min = Higher R_max