Design and experimental validations of a new shaped subreflector geometry for Cassegrain system

A new shaped subreflector geometry for a Cassegrain system is presented. The idea is to deform the classical hyperboloidal surface to reduce the spillover and the cross-polarization. The high gain antenna so obtained is validated by experiment which illustrates the excellent results for a 60 cm antenna/80 mm subreflector system in the frequency range between 37 and 40 GHz. Different types of antennas have been designed and produced.