An Array of Tulip-Flower Shaped Printed Radiators for Direct Broadcast Satellite (DBS) Applications

Abstract

A printed array of microstrip radiators for DBS applications has been reported in this paper. The sole element is derived from a nature-inspired Tulip-flower-shaped geometry whose resonated at 12.50 GHz. One regular ellipse and pair of semi-ellipses are jointly formed the proposed structure, and in order to resonate at the desired frequency, an anchor-shaped slotted structure is etched from the center of the resultant geometry. The single proposed element’s time-domain parameters has been analysed for side-by-side and face-to-face arrangements. The feed network of the array is designed based on Wilkinson power divider and achieve a low-loss, high-isolation, and better impedance bandwidth responses. The antenna and the array are offered the directivity of 9.36 and 14.96 dBi, respectively. A 100% bandwidth coverage, a shallow x-pol. along the main-beam direction, immense radiation efficiency, and satisfactory electromagnetic compatibility performances have been achieved from both antennas. The antennas are convenient for DBS applications.