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在本文所叙述的技术中,加在阵列单元准直相位上的可控随机相位,有效地改变了由光学馈电形成的孔径振幅分布,以获得超低副瓣天线方向图。由于随机相位而降低的增益值,相应于具有同样中心照射峰值的低副瓣孔径分布情况,而在大型阵中均方根副瓣的升高是很有限的。本技术的实现及其性能评估,通过计算机模拟详细加以叙述。文章最后还介绍了一个典型实例的模拟结果。
In the techniques described herein, the addition of a controllable random phase over the alignment phase of the array elements effectively changes the aperture amplitude distribution formed by the optical feed to obtain an ultra-low sidelobe antenna pattern. The reduced gain due to the random phase corresponds to the distribution of low side lobe aperture distributions with the same central illumination peak, whereas the rise of the rms side lobe in a large array is very limited. The realization of the technology and its performance evaluation, described in detail by computer simulation. Finally, the article also introduces the simulation results of a typical example.