LAUSR

This paper presents the preliminary simulation results of the prototype 40-element Phased Array Feed (PAF) array for the FAST telescope, and the measurement of a manufactured single Vivaldi element. The simulation results include the characteristic of a stand-alone Vivaldi element. And the full wave simulation of the explicit PAF array is carried out, from which the performance of the embeded elements and the mutual coupling among the elements could be accurately inferred. The performance of the combination of the PAF and the main reflector of FAST is calculated. The results imply that the PAF combined with the FAST antenna could operate over a much wider bandwith from 650 to 1450MHz compared with the stand-alone element. The antenna temperature remains almost the same for zenith angle from 0 to 40 degree. From the simulation results, the PAF has shown good potential to improve the performance of the FAST telescope. A measurement of a manufactured Vivaldi element is also presented.