Research papers

Results are presented of investigations with a laboratory model of a reconformable reflector for MM and sub-MM applications. A configuration with 19 actuators to control the surface has been realised. Several configuration shapes have been evaluated to prove the concept,…

A mechanically controllable reflector has been manufactured by using an electroformed Nickel shell supported and controlled by 19 actuators. If such a system is used as subreflector in a millimetre-wave antenna system for limb-sounding applications, it is possible to reduce…

A fast physical optics (PO) method is presented which in two steps calculates the scattered field of an optical component in a beam waveguide (BWG). The first step involves a calculation of a set of equivalent currents on an auxiliary…

The new light-weight reflector antenna technology being developed by several spacecraft companies requires accurate electromagnetic modelling of the reflector surface properties. In particular, the new tri-axially woven fibre skins are of interest. In a recent study for ESTEC a new…

The analysis of a polarisation-sensitive reflector system consisting of two individual reflecting surfaces is described. A procedure is given by which all the predictable scattering effects that will influence the far-field radiation pattern are accounted for. The problem of describing…