Figure 3
Spectra of the experimental inverse, zero and normal Doppler effects.
(a–c) Spectra of the reflected wave at three frequencies: (a) fL = 690 MHZ, (b) fZ = 852 MHZ and (c) fR = 990 MHZ with the same speed of the reflective interface. The spectra at left side are under the condition that the interface is approaching the source while the spectra at right side are under the condition that the interface is moving away from the source.
