High Performance Corrugated Horn Antennas for CosmoGal Satellite

This paper presents the design methodology for the creation of corrugated horn antennas for the CosmoGal satellite. The mission will collect the radiation of the cosmic microwave background, by a radiometer in three different radio astronomy frequency bands (10.6-10.7 GHz; 15.35-15.4 GHz; 23.6-24 GHz). It is discussed the design study of several types of horns, simulated on the CST software. The best result points to a choked Gaussian corrugated horn antenna, with directivity of 23dBi, side lobes below -35 dB and cross polarization better than -45 dB.