Ultra-low side-lobes with optically fed phases array antenna

Abstract

In the proposed technique, controlled random phases added to the collimating phases of the elements of an array effectively change the aperture amplitude distribution, from an optical feed, to obtain an ultralow sidelobe antenna pattern. The reduced directive gain due to the random phases corresponds to that of the low sidelobe aperture distribution with the same central peak illumination, while the increase in the RMS sidelobes is sufficiently low in large arrays. Implementation of the technique and its performance evaluation, through computer simulation, are detailed. The work concludes with the results of simulation on a typical implementation.<>