Radar Engineering and Satellite Communication MCQs

Question 1

A high noise figure in a receiver means

Accepted Answer

poor minimum detectable signal

Answer

good detectable signal

Answer

receiver bandwidth is reduced

Answer

high power loss

Question 2

Which of the following is the biggest disadvantages ofCW Doppler radar?

Accepted Answer

it does not give the target range

Answer

it does not give the target velocity

Answer

it does not give the target position

Answer

Atransponder is required at the target

Question 3

The function of the quartz delay line in a MTI radar is to

Accepted Answer

help in subtracting a complete scan from the previous scan

Answer

match the phase of the coho and the output oscillator

Answer

match the phase of the coho and the stabo

Answer

delay a sweep so that the next sweep can be subtracted from it

Question 4

Second time around echoes are caused bY

Accepted Answer

echoes that arrive after transmission of the next pulse

Answer

second time reflection from target

Answer

echoes returning from targets beyond the cathode ray tube range

Answer

extreme ends of bandwidth

Question 5

Which of the following diode is used as detector in a radar?

Accepted Answer

IMPATTdiode

Answer

gunn diode

Answer

schottky diode

Answer

any of the above

Question 6

In a radar in case the return echo arrives after the allocated pulse interval, then

Accepted Answer

the target will appear closer than it really is

Answer

it will not be received

Answer

the receiver will get overloaded

Answer

it may interfere with the operation of the transmitter

Question 7

The average power of a pulsed radar transmitter is given by

Accepted Answer

the product of peak power of the pulse and the duty cycle

Answer

peak power divided by the number of pulses repeated in one second

Answer

peak power divided by the duty cycle

Answer

none of the above

Question 8

PPI in a radar system stands for

Accepted Answer

plan position indicator

Answer

pulse position indicator

Answer

plan position image

Answer

prior position indentification

Question 9

In case the ratio of the antenna diameter to the wavelength in a radar system is high, this is likely not to result in

Accepted Answer

increased capture area

Answer

good target discrimination

Answer

difficult target acquistion

Answer

largermaximum range