Research papers

Shaped reflectors form one of the cornerstones of satellite telecommunications today, and have in all but a few cases replaced the array-fed parabolic reflector antennas for contoured beam generation. The evolution started in the 1990’es with the advent of efficient…

A feasibility study of a shaped dual reflector antenna equipped with a reconfigurable subreflector for a realistic mission scenario in Ku band is presented. The reconfigurable surface will be modelled by a mesh of interwoven flexible wires, supported by control…

A compact antenna test range has been analysed for stray signals. The analysis is based on GTD ray tracing, i.e. obeying the reflection law in the chamber walls and assuming straight edges of reflectors and walls. Comparisons to an RCS…

An effective technique for extracting the singularity of plane wave spectra in the computation of antenna aperture fields is pro­posed The singular spectrum is first factorized into a product of a finite function and a singular function. The finite function…

The transformation between the spherical wave expansion (SWE) and the plane wave expansion (PWE) is investigated with respect to a range of its fundamental properties. First, the transformation of individual spherical waves is studied in order to understand how these…