一种Y形自适应天线阵及其性能研究

A Y-Like Adaptive Antenna Array and its Performance Simulation

提出了一种用于自适应天线的Y形天线阵,并给出了其方向图、输出信干噪比和自适应处理增益的仿真过程。比较了在相同的信号环境和使用相同的自适应算法时,该天线阵与常用的均匀直线阵、等间隔圆形阵的性能。结果表明,使用该天线阵,输出信干噪比和自适应处理增益与均匀直线阵基本相同,优于等间隔圆形阵。而且该天线阵可使均匀直线阵的尺寸大大减小,同时能够克服均匀直线阵主波束对称出现,不能抑制与期望信号方向对称的干扰信号的缺点。

A Y-like adaptive antenna array is presented. The simulation processes of its radiation pattern, the SINR of output signals （signal-to-interference and noise ratio） and the adaptive processing gain are introduced, With the same signal environment and using the same adaptive algorithm, the performance of this antenna array is compared to the other two anten- na arrays the uniform linear array and the uniform circular array. The result shows that, using this antenna array, the SINR of output signals and the adaptive processing gain are all approximate to a uniform linear array but better than a uniform circular array. At the same time, it can reduce the size of the uniform linear array greatly while it can help to overcome the defect of the uniform linear array. When using a uniform linear array, the two chief wave beams appear symmetrically, and the interference signal which is symmetric to the desired signal can＇ t be canceled.