Abstract: A constrained least-square method for near field beamforming is presented.The method uses a near field signal model to design the beamformer and can be used for arbitrary geometry arrays.In the design procedure,sum of the square error in the mainlobe regions is made minimal while the sidelobe regions of the beam pattern are constrained.The desired design specifications can be obtained both in the mainlobe and sidelobes,and the implementation of the method is simple.Results of simulation for a 32-element uniform circular array verify the effectiveness of the method.