CW and FMCW RADAR

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​)?

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• 
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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