Array Antenna Optimization And Its Wide-angle Scanning Technology Research

The conformal array antenna is widely used in stealth aircraft and stealth radar,etc.,because it does not change the carrier's aerodynamic performance,low radar cross section(RCS)and wide scanning angle.In recent years,it has received more and more attention from scholars at home and abroad.In order to find a method for optimizing the low sidelobe performance and wide-angle scanning performance of array antenna pattern,this paper studies the integrated method of array antenna.The research content is mainly divided into the following three parts:First,the array pattern synthesis based on the active pattern extraction method.In this paper,an example of a 7-ary microstrip patch linear array is given,and the related operation flow of the active pattern extraction method is given.The array pattern synthesis method based on the sub-array extraction pattern is introduced,and the method is demonstrated by integrating a 7-element linear array.Finally,the active pattern method and the Euler space coordinate transformation method are used to synthesize the pattern of an 8-element cylindrical conformal array.Second,the study of hybrid genetic particle swarm optimization.Firstly,the basic principles and workflow of genetic algorithm and particle swarm optimization algorithm are introduced.The advantages and disadvantages of the two algorithms are introduced.The two algorithms are organically combined to form a new hybrid genetic particle swarm optimization algorithm.The performance of the hybrid algorithm is tested.The test results show that the algorithm can basically meet the requirements of subsequent array optimization.Third,the optimization of the conformal array pattern based on the intelligent evolutionary algorithm.In the fourth chapter,the hybrid algorithm is used to optimize the low side lobes and scanning angles of the cylindrical conformal array and the frustal conformal array.In this paper,the active pattern extraction method and the hybrid algorithm are combined and fixed.The phase of the array unit feed are invariable.We achieve wide scan angle and low sidelobe performance of the conformal array by optimizing the amplitude of the feed.The final simulation results show that the method is correct for array optimization.