Uniform Array with Broadband Beamforming for Arbitrary Beam Patterns

Abstract: Broadband beamforming is a technique to obtain the signal with a wide range of frequencies. It maintains the signal integrity and spatial selectivity over frequencies. This is important in several applications such as microphone array, sonar array or radar where the operation range of the signal is several octaves. Using uniform array for broadband beamforming is the old topic but there is no available design method for the arbitrary beam patterns, except the optimization methods. In this paper, we present a new method based on geometry translation and coordinate transformation to design broadband beamformer for arbitrary beam patterns. The new method uses less computation time than the optimization methods and it could help to find a better configuration of the array such as fewer sensors, smaller size.