1-Basic on Phased Array

Module 1:
Basic on Phased Array
Document 3| Rev. 4 16 July 2012 – PC 18 Campus & PC Dott. Certo
Phased Array training Course
Patchbook n° 415 / 1

Structure of a linear PHA probe
backing Single element in
piezoelectric material
Adaptation layer
Element
width
gap between elements
Step between
elements
Connection to the instrumentation

Ultrasound beam generated by a PHA
probe with constant time excitattion
Overall wave front as the envelope of the wave front
generated by the probe elements
Cylindrical wave
fronts generated by
each probe element
Array probe
with 8
elements
Excitation pulses
at constant delay
time

Ultrasound beam generated by a PHA probe
with linear time delay variation of excitation
Excitation pulses
with a linear time
delay variation
Array probe
with 8
elements
Overall wave front as envelope of the single wave fronts
generated by each probe elements

Parameters influencing the
orientation angle of the generated
ultrasonic beam
increasing the delay time in excitation pulses, the
beam angle increases;
increasing ultrasonic velocity, the beam angle
increases;
increasing the step between probe elements, the
beam angle decreases.