To lessen the computational cost of optimal weight phasor in massive linear isotropic phase-only arrays

a novel partially adaptive approach suiting for both beamforming receiving and transmission is presented in this paper.With this approach

array elements controlling nulls are partially selected adaptively (PA) and the optimal phasor is achieved by partial phase-only conjugate gradient algorithm to mitigate interferences according to the maximal signal to interference plus noise ratio(SINR).The simulations show that the computational performance will be improved greatly while the mainbeam loss

mainlobe shape distortion and nulls depth in the directions of arrival(DOA) of interference of the far-field pattern do not change significantly compared to the full adaptive(FA)case with assumptions that the number of interferences are less than half of the array elements and directions of arrival of interference are not in the mainbeam of the arrays.