基于最小二乘法的平面波综合

Plane Wave Synthesis Based on Least Square Method

将最小二乘法引入近场天线测量中,提出了一种新的平面波综合方法。以半波对称振子组成的矩形平面阵作为平面波综合的理论模型,用这一新方法寻求阵列单元的最佳幅相分布,以使所综合出的准平面波质量最好。计算结果表明在待测区域大小一定的条件下,利用本文方法可以实现较传统方法更小的探头阵列要求。良好的仿真结果证实了该方法在天线测量及散射测量应用中的有效性。

A novel method of plane wave synthesis is presented with the introduction of least square method into nearfield antenna measurements. With the rectangular planar array which is made up of haft-wavelength dipole elements as the theoretic model of plane wave synthesis, the novel method is used to seek optimization for amplitude and phase distribution of array element so as to make the quality of quasi plane wave synthesized to be the best. The calculation results show that under the condition that the size of the region under test remains unvaried, the method presented in this paper requires smaller probe array than the traditional methods. The good simulation results prove the validity of this method to be applied in antenna measurements and scattering measurements.