Abstract: A wideband multibeamforming method based on the Farrowstructure is proposed. The multibeamforming is realized via multiple sets of weight in the beam steering module, with no need of redesign of the wideband beamformers. The proposed method improves the beamwidth invariance and reduces the sidelobe of the multibeam. To solve the problem of great implementation of complexity, the sparse design concept is introduced. The taps sparse design decreases the effective order of the Farrowstructure and reduces the compexity of realization. Simulation results demonstrate the effectiveness of the proposed method.

Key words: wideband multibeamforming, beamwidth invariance, Farrowstructure, sparse design