Simulation of Acoustical Field for Linear Phased Array Transducer

An efficient model in three-dimensional (3D) space is presented to calculate the far field spatial acoustic pressure distribution of the wave radiated from the linear phased array transducer on the basis of Huygens' superposition Principle. In this model, the element of the linear phased array is considered as finite dimensions in its two directions. Based on this approach, the beam profiles of the linear phased array under continuous wave (CW) excitation are investigated. Influences of parameters of the linear phased array on spatial beam pressure distribution are systematically analysed. Those parameters are the pitch, the element width and length, the number of elements, the total aperture and the frequency. It is shown that they play an important role in determining array spatial profiles.