Adaptive Beamforming with Low Sidelobe in Fundamental Component of 4- D Antenna Arrays

In this paper, adaptive beamforming with low sidelobe and deep null in fundamental component of four dimensional (4-D) antenna arrays is realized by using an improved switch structure and optimizing time sequences with wolf pack algorithm. First., adaptive beamforming in fundamental component is realized with amplitude modulation and phase modulation by time modulation based on the improved switch structure. Then, wolf pack algorithm is used to optimize time sequences to suppress sidelobe of adaptive beam. This method not only realizes adaptive beamforming in fundamental component., but also realizes low sidelobe optimization based on achieving main beam to target direction and nulls to interference direction., and suppresses strong clutter interference on sidelobe direction effectively.