MTI and Pulse Doppler Radar

Range is...?

• Direction

• Distance

• Detection

• Duplexer

If the peak transmitted power in a radar system is increased by a factor of 16, the maximum range will be increased by a factor

• 2

• 4

• 8

• 16

When a power P_t is transmitted by an antenna, amount of energy incident on the target is given by the expression:

• P_t×G/4πR²

• P_t/4πR²

• P_t×4 πR²/G

• None of the mentioned

The term RADAR cross section defines the:

• Scattering ability of the target

• Power radiating ability of the radar

• Amount of energy scattered by unwanted objects

• Cross section of radar area through which energy is emitted

The Doppler shift Df is given by

• 2Vr / k

• Vr / 2 k

• 2k / Vr

• k/ Vr

The COHO in MTI radar operates at the

• a. received frequency

• b. pulse repetition frequency

• c. transmitted frequency

• d. intermediate frequency.

Which of the following will be the best scanning system for tracking after a target has been acquired

• a. Conical

• b. Spiral

• c. Helical

• d. Nodding

A high noise figure in a receiver means

• a. poor minimum detectable signal

• b. good detectable signal

• c. receiver bandwidth is reduced

• d. high power loss.

Increasing the pulse width in a pulse radar - c. has no effect on resolution

• a. increases resolution

• b. decreases resolution

• c. has no effect on resolution

• d. increase the power gain

A simple CW radar does not give range information because

• a. it uses the principle of Doppler shift

• b. continuous echo cannot be associated with any specific part of the transmitted wave

• c. CW wave do not reflect from a target

• d. multi echoes distort the information