Investigation of focusing possibilities of convex and cylindrical phased arrays

Abstract

This paper explores acoustic field simulation of 128 elements cylindrical phased array. The simulations were performed in a homogenous medium - water at several frequencies from 2.25 MHz to 7.5 MHz. Beam width versus the focal distance with a different number of active elements for chosen focal distance is simulated. To determine focusing efficiency of the cylindrical array the beam width of the main lobe was calculated at -6dB and -12dB levels while the array is operating in transmission mode. The influence of the array active aperture size to the beam width was analyzed.