Microwave and Radar Engineering

APP C

Doppler Frequency Shift

Doppler Shift

Suppose the target in the radar field of view is moving with a velocity component, v, toward the radar; from the theory of special relativity, the received frequency is given by

f_r = f

where f is the transmitted frequency, and c is the speed of light.

For the receding target, v should be replaced by –v.

The equation can be simplified by

f_r = f

= f

= f

Discarding all second-order and higher terms in ...