A prototype of two-dimensional transducer array with reduced number of elements, based
on segmented annular distribution is presented. The capability of this array to produce …

The impulse response of the velocity potential and the discrete representation methods were
used in order to model the acoustic field radiated by ultrasonic transducers and arrays. The …

Two-dimensional (2-D) arrays of squared matrix have maximum periodicity in their main
directions; consequently, they require half wavelength (λ2), interelement spacing to avoid …

Abstract The so-called Localized Waves (LW), and the “Frozen Waves”(FW), have raised
significant attention in the areas of Optics and Ultrasound, because of their surprising energy …

Conventional 2D arrays have a set of squared elements whose inter-element spacing is
around λ/2. This arrangement requires an excessive amount of electronic resources for the …

Due to the aperture periodicity, the inter-element spacing of two-dimensional squared arrays
is maintained near λ/2 in order to avoid grating lobes. This condition gives rise to severe …

The ultrasonic annular array transducer usually has a stronger focusing acoustic field than
the linear array and matrix transducer with the same number of array elements, and is more …

A method for the calculation of the impulse response of annular-sectorial (also called
annular-segmented) pistons embedded in an infinite rigid baffle is presented. Our …

The impulse response of the velocity potential and the discrete representation methods were
used in order to model the acoustic field radiated by ultrasonic transducers and arrays. The …

Segmented annular arrays (SAA) can be a good option to generate 3-D ultrasonic images.
Design this kind of aperture involves a variety of geometrical parameters that are decisive for …