Analysis And Design Of Navigation Antenna

The ability of anti-jamming is an important index in the navigation system,and the navigation antenna can improve the anti-jamming ability of the system. In this paper, the navigation antenna is researched.In this paper,the background of the topic and the development of the circular array is introduced. To the point, the knowledge of the antenna array is proposed. By analyzing the theory about the circular array,and applying the mirror theory to the array. Then the directivity,phase mode and virtual cell is expatiated.The GPS antenna array need to realize adaptive null anti-jamming. In the paper, adaptive null anti-jamming theory and the main algorithm are proposed respectively. One circle and two circles of circular array can produce sum beam and adaptive null, difference beam of axial null.First of all, an eight elements'array is proposed, the low sidelobe and beam-scanning are realized in sum beam, and the axial null is achieved in the difference beam. Next, the four elements'array is introduced as same as the eight elements'array.