Impact of array structure geometries on the performance of circular array pattern

Space division multiple access (SDMA) is still a good topic for increasing channel capacity in future wireless communication systems. Improving performance of the user in the spatial domain depends on the array geometries and as a result of the optimum element geometries for SDMA should be defined, beamforming play a very important role providing fundamental theory of design procedure. However the pattern of antenna array is determined by array geometry. This paper focuses on various geometries of eight antenna arrays using patch elements placed on ring shapes.