The Choice of Subreflector Suprort Geometr for Earth Station Antennas

Abstract

The sidelobe radiation associated wi th earth station antennas for satellite communication is rapidly becoming a critical design parameter. The efficiency of both frequency and orbi t uti l isation can be improved by control of the sidelobe response of the earth station antenna and, consequently, a reduction in the interference with neighbouring systems.It has been shown, (1,2), that this sidelobe response depends on several factors each requiring careful attention in the design phase. One of the least characterised of these factors is the scattering associated with the subreflector or feed support structure, particularly when this is of lattice construction. A measurement programme has been undertaken aimed at comparing the scattering associated with different types of support strut configurations which are commonly employed in large earth station antennas.

Optimization and Modeling Tools for Telescope Hexapod Structures

“…Claydon and Dang's article "The Choice of Subreflector Support Geometry for Earth Station Antennas" [1] discussed the various interference or scattering properties of subreflector (secondary) support structures. Despite the fact that the study was based on quadrupod structures, it analyzed the scattering effects from different cross-sectional member profiles.…”