Ultrasound imaging apparatus and control method thereof

An ultrasound imaging apparatus comprising:

• an ultrasound probe;
• a signal transceiver configured to transmit/receive an ultrasound signal to/from the ultrasound probe;
• and
• a variable inductor device configured to, while the ultrasound probe converts a pulse signal received from the signal transceiver into the ultrasound signal, receives an echo ultrasound signal reflected from an object, converts the echo ultrasound signal into the pulse signal, and then transmits the pulse signal to the signal transceiver, successively change inductance for impedance matching with the ultrasound probe during a transmission/reception time period of the ultrasound signal,
• wherein the variable inductor device comprises:
• a plurality of inductors which are stacked and have different inductance values;
• and
• a plurality of switches, each of which is disposed between the plurality of inductors and connecting the plurality of inductors to one another,
• wherein the variable inductor device selectively connects the plurality of inductors according to operation of the plurality of switches to change the inductance, and successively changes inductance according to a change in center frequency of the echo ultrasound signal received from the ultrasound probe.