GPS 天线阵列幅相一致性研究

摘要

small-scale GPS antenna array and its effect on the adaptive null-steering of received array pattern are in-vestigated.A square-arrangement GPS antenna array and a triangular-arrangement one are simulated re-spectively.The results show that the received patterns of element antennas are interfered by the mutual coupling between the element antennas, and the amplitude and phase imbalance of received signals by different element antennas in a triangular-arrangement antenna array is superior to that in a square-ar-rangement one.Thereafter, the influence of the amplitude and phase imbalance of a 7-elements GPS an-tenna array on the pattern nulling of array is researched further .The response curve of the null depth of received array pattern versus the illuminated direction of interference signal is presented .%研究了小规模GPS天线阵列中不同单元天线接收信号的幅相一致性及其对阵列接收方向图自适应调零的影响。对正方形排布和三角形排布的GPS天线阵列分别进行了仿真。仿真结果表明，阵元间互耦对单元天线的接收方向图有着明显的影响，三角形排布阵列的单元天线接收信号的幅相一致性要优于正方形排布阵列。然后，进一步研究了7元GPS天线阵的幅相一致性对阵列天线方向图零点形成的影响，给出了阵列接收方向图零陷深度随干扰信号入射方向变化的响应曲线。