Analysis of the Reflector Antenna’s Feed Taper Level

Based on the experimental verification, this paper analyses the changes of antenna gain, sidelobe level, edge coverage gain and aperture efficiency when the taper level of the feed horn changes, and puts forward a range of optimal taper level. By introducing the concept of spatial attenuation of reflector antenna, a more accurate method to determine the taper level is given. Based on the value of the tapered level, it can provide quite favorable reference for different types of reflector characteristics in future design work.