遗传算法在宽窄波束切换天线阵设计中的应用

采用对天线单元开关通断的方法,使天线阵形成不同的远场辐射方向图,实现阵列天线方向图宽波束和窄波束的切换。对一个24元线阵天线阵进行了设计。提出了一种改进的遗传算法及其目标函数模型。采用该算法对天线阵各个天线单元的电流幅度进行了优化计算,计算结果显示能够产生满足设计要求的宽波束和窄波束方向图。最后采用HFSS软件进行了仿真,计算结果与仿真结果吻合,证明了所提方法的有效性。

Application of Genetic Algorithm in design of a broad and narrow beams switched antenna array

Antenna array can generate different far field radiation patterns by u sing switch to turn on or turn off the excitation of the array elements. In this way, a broad or narrow beam can be realized for an antenna array. The des ign of a 24-element linear antenna array is presented. Then an improved genetic algorithm(GA) and its weight objective function model are proposed to optimize the amplitudes of the currents of the array elements. Calculated re sults show that the radiation patterns of the broad beam and the narrow beam mee t the design requirement. Finally, the software HFSS is used to simulate. The ca lculated results are in good agreement with the simulated ones, which proves the validity of the proposed method.