WorksheetsCW and FMCW RADAR
Total questions: 25
Worksheet time: 13mins
CW Radar operates based on which principle?
Time delay measurement
Doppler effect
Pulse modulation
Frequency hopping
What is the primary difference between CW radar and FMCW radar?
CW radar measures distance, while FMCW radar measures velocity
CW radar measures velocity, while FMCW radar measures both velocity and distance
FMCW radar cannot measure velocity
CW radar is more complex than FMCW
In a CW radar, what happens when a moving target is detected?
No frequency shift occurs
A frequency shift proportional to velocity occurs
The signal is blocked
The phase remains constant
What does FMCW radar stand for?
Frequency Managed Carrier Wave
Fast Modulated Carrier Wave
Frequency Modulated Continuous Wave
Fixed Modulation Continuous Wave
What is the formula for Doppler frequency shift (fdf_dfd)?
If a target moves toward a CW radar, the Doppler shift is:
Zero
Positive
Negative
Infinite
If a target moves away from a CW radar, the Doppler shift is:
Negative
Zero
Positive
Infinite
A radar transmits at 10 GHz. If a target moves toward the radar at 30 m/s, what is the approximate Doppler shift?
200 Hz
2 kHz
2 MHz
20 kHz
In an FMCW radar, frequency modulation is typically done using:
AM modulation
FM modulation
Phase shift keying
Pulse width modulation
What is the wavelength of a 5 GHz radar signal?
6 cm
5 mm
3 cm
60 cm
If a target moves at 15 m/s and the radar transmits at 8 GHz, what is the Doppler frequency?
800 Hz
8000 Hz
800 kHz
80 MHz
FMCW radar is mainly used for:
Only velocity measurement
Measuring range and velocity
Only range measurement
Signal blocking
The unit of Doppler frequency is:
m/s
Hz
dB
m
If a target is stationary, what is the Doppler shift?
Zero
Infinite
Depends on wavelength
Cannot be determined
What is 1 nautical mile in meters?
1000 m
1609 m
1852 m
2000 m
Convert 1 nautical mile per hour (knots) to meters per second.
a)
b)
c)
d)
0.514 m/s
1 m/s
1.5 m/s
3 m/s
Convert 10 knots to m/s.
1.5 m/s
5.14 m/s
10.5 m/s
15.2 m/s
The Doppler frequency shift increases when:
Velocity of the target increases
Wavelength increases
Radar frequency decreases
The target stops moving
The Doppler shift depends on:
Only the radar frequency
Only the speed of the target
Both radar frequency and target speed
Only the transmitted power
Which type of radar is used for speed measurement in traffic monitoring?
FMCW radar
Pulse radar
CW Doppler radar
Weather radar
If the Doppler shift is 5 kHz and the transmitted frequency is 10 GHz, what is the velocity of the target?
75 m/s
150 m/s
300 m/s
450 m/s
Which of the following is NOT a correct unit for measuring speed?
m/s
knots
nautical miles/hour
Hz
A target moves at 50 knots. Convert its speed to m/s. (1 knot = 1.852 km/h)
25.7 m/s
18.52 m/s
15.4 m/s
20 m/s
If a ship travels 5 nautical miles per hour, what is its speed in meters per second?
2.57 m/s
5.14 m/s
10.28 m/s
15.2 m/s
Convert 10 nautical miles to kilometers.
18.52 km
20.1 km
15.2 km
10.5 km
