Analysis of Pinwheel type Aperiodic Clustering for Sidelobe level Improvement in Phased Array Antenna

This paper presents the analysis of phased array antenna where elements are clustered using Pinwheel type aperiodic tiling pattern, to improve side lobe level (SLL). Parametric analysis has been carried out to select optimum subsection of Pinwheel pattern for clustering of array which is excited with required phased excitation to achieve 10° and 20° beam scan. Worst SLL in 3D radiation pattern of an array with Pinwheel clustering is improved by 3.8dB and 6.6dB for 10° and 20° beam scan respectively. Moreover, no. of TRMs has also been reduced by 68% while maintaining significantly low SLL.