  Efficient manipulation of spin waves (SWs) is considered as one of the
promising means for encoding information with low power consumption in next
generation spintronic devices. The SW Doppler shift is one important phenomenon
by manipulating SWs propagation. Here, we predict an efficient way to control
the SW Doppler shift by voltage control magnetic anisotropy boundary (MAB)
movement in FM/FE heterojunction. From the micromagnetic simulation, we
verified that the SW Doppler shift aligns well with our theoretical predictions
in Fe/$\rm BaTiO_3$ heterostructure. The SW Doppler shift also shows ultra
wide-band shift (over 5 GHz) property with voltage. Such efficient SW Doppler
shift may provide one possible way to measure the Hawking radiation of an
analogue black hole in the SW systems.
