Research papers

A general, accurate, and efficient stand-alone commercial program for antenna diagnostics, DIATOOL, has been developed by TICRA. The software reconstructs the field or the equivalent currents on a plane or an arbitrary 3D surface enclosing the antenna. The fundamental properties…

Kriging fitting, originally developed for geological exploitation, is here applied for fitting an expected pattern to noisy, irregular in-flight measurements of a satellite antenna. The noise level in in-flight measurements is often so high that only the central part of…

A new method to analyze reflectarrays with rectangular patches is proposed. While the standard procedure has been to calculate the electric currents on the patches using e.g. a periodic Green’s function or a Method of Moments approach, the present method…

A higher-order inverse method of moments algorithm, employing smooth current and geometry representations, as well as a very noise-robust solution algorithm, was presented at last year’s ESA workshop. The fundamental properties of the algorithm, including quantitative results for the RMS…

In-flight measurements of satellite antenna patterns are often given in a highly irregular grid and the data may be influenced by severe noise such that an accurate pat-tern determination is difficult. In this paper, a two-step fitting algorithm for retrieval…