CMRT Signal Processing & Antenna Theory

Question 1

What is the purpose of signal processing in radar systems?

Accepted Answer

To improve the quality and clarity of received signals.

Answer

To reduce the size of the radar system.

Answer

To increase the transmission power.

Answer

To decrease the frequency of radar waves.

Question 2

What is the function of an antenna in radar systems?

Accepted Answer

To transmit and receive electromagnetic waves.

Answer

To analyze the strength of radar waves.

Answer

To store data.

Answer

To reduce interference.

Question 3

What is the difference between active and passive radar systems?

Accepted Answer

Active systems emit signals; passive systems detect external signals.

Answer

Active systems are used for navigation only.

Answer

Passive systems emit signals and reflect them.

Answer

There is no difference.

Question 4

How does frequency affect radar performance?

Accepted Answer

Higher frequencies improve resolution but reduce range.

Answer

Higher frequencies improve range but reduce resolution.

Answer

Lower frequencies improve resolution but reduce range.

Answer

Frequency has no impact on radar performance.

Question 5

What is the role of Doppler effect in radar systems?

Accepted Answer

To determine the relative speed of the target.

Answer

To measure the distance to the target.

Answer

To analyze the size of the target.

Answer

To detect obstacles in the radar path.

Question 6

How does antenna gain affect radar performance?

Accepted Answer

It increases the signal strength in a specific direction.

Answer

It reduces the radar's detection range.

Answer

It decreases the radar's resolution.

Answer

It increases the radar's power consumption.

Question 7

What is the relationship between antenna aperture and radar resolution?

Accepted Answer

Larger apertures improve radar resolution.

Answer

Larger apertures decrease radar resolution.

Answer

Antenna aperture does not affect resolution.

Answer

Antenna aperture only affects range, not resolution.

Question 8

How do radar systems handle interference?

Accepted Answer

By using signal filtering and pulse compression.

Answer

By increasing the transmission power.

Answer

By using a lower frequency.

Answer

By reducing the antenna size.

Question 9

What is beamforming in radar systems?

Accepted Answer

The technique of controlling the directionality of the radar beam.

Answer

The ability to change the radar's frequency.

Answer

The ability to adjust the radar's signal power.

Answer

The method of reducing radar signal strength.