Influences of the Reflector Subtended Angle on the Performance of Parabolic Antennas with Feed Displacement

Abstract

In this work, the comprehensive influence of different reflector subtended angle values and the displacement of feed on a parabolic reflector antenna was studied. There are two main reasons for this research; one is that the actual performance of antennas is worse than indicated in theoretical analysis, and the other is that the deep or derived impacts of some deviations cannot be taken into sufficient account for antenna design. Differing from the ideal theoretical analysis and calculation, a parabolic reflector antenna with a pyramidal horn feed was designed to make the antenna design more suitable for the actual project. The performance of the antenna with different deviations of the feed under different reflector subtended angles was then given. This research has higher practical guiding significance in terms of margin consideration for the design of antennas in engineering.