Design of a Gaussian Backscatter Antenna with Ring Focus Feed

摘要

This paper presents a design of a Gaussian backscatter antenna with ring focus feed. The curvature of main reflector is Gaussian, and the subreflector is a portion of an ellipse. The antenna has axial symmetry. A backscattering technique is used with the main reflector to achieve wide beamwidth. The input parameters of the proposed antenna are derived in closed form. For analysis and design physical theory of diffraction (PTD) is utilized. The proposed antenna can produce high gain (maximum gain = 11.8 dB), wide beamwidth (coverage angle 0 = ±65°) and small diffraction effects. This antenna can be used for realizing earth coverage beam in LEO satellite or indoor wireless LAN applications.