Dynamic thinning strategy for adaptive nulling in planar antenna arrays

An approach for the suppression of undesired signals impinging on a planar array is presented in this paper. The procedure is based on a dynamic thinning enforced to the array to move sidelobe nulls. Towards this aim, each element of the array is equipped with a radio-frequency switch which is used to connect/disconnect the element to the feeding network. While changing the thinning sequences, the number of active elements is kept as constant as possible to maintain unaltered the antenna gain. A set of representative results is reported to show the effectiveness of the approach.