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What is the principle of FMCW radar?
Frequency modulated continuous wave (FMCW) radar works by transmitting a continuous signal that varies in frequency over time. This frequency modulation allows the radar to measure the delay between transmitted and received signals, which is used to calculate the distance to an object.
By analyzing the frequency difference between transmitted and received signals, the radar can determine both the range and relative speed of targets.
What is the principle of radar detection?
Radar detection works on the principle of transmitting electromagnetic waves and analyzing signals reflected from objects. The radar system sends a pulse or continuous wave, which reflects the targets and returns to the radar receiver.
By measuring the time it takes for the signal to return and the strength of the returned signal, radar can detect the presence, distance, and sometimes speed and characteristics of the target.
What is the working principle of continuous wave radar?
Continuous wave (CW) radar continuously transmits a single frequency signal without interruption. It measures the Doppler shift in the frequency of the returned signal caused by the relative movement of the target.
This Doppler shift allows the CW radar to determine the speed of the target but does not provide range information because it lacks measurements in the time domain.
Multiple frequency continuous wave (MFCW) radar works by transmitting multiple continuous wave signals at different frequencies simultaneously or sequentially. By comparing the phase differences between signals received at these different frequencies, the radar can determine the range of the target.
This technique combines the advantages of CW radar speed measurement with the ability to measure range, providing more complete information about the target.
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