Frank Jensen

Emeritus

Education: PhD, MSc in Electrical Engineering Specialization: Spherical near-field far-field theory, probe design and calibrations, antenna coupling, platform scattering With TICRA since: 1972

Phone: +45 3312 4572

Frank is Emeritus at TICRA. He has worked with evaluation of antenna measurements, especially compact test range performances, and he has designed and constructed high precision dual-polarized near-field probes. In his PhD thesis he developed the basis for the spherical near-field to far-field transformation.

A contoured-beam reflector satellite antenna using two doubly curved circular polarization selective surfaces

In this paper we present antenna system using a circular polarization selective surface (CPSS) to realize a circular polarization (CP) equivalent to the widely used linear polarization (LP) gridded or dual-gridded reflector (DGR). The CPSS is realized by a multilayer…

Design and Validation of Compact Antenna Test Ranges using Computational EM

The design of modern Compact Antenna Test Ranges (CATRs) is a challenging task, and to achieve strong performance, simulation using computational electromagnetics is a vital part of the design process. However, the large electrical size, geometrical complexity and high accuracy…

A Novel Accurate Pattern Fitting of Noisy Irregular Beam Data for the Planck Space Telescope

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…

Grating-Lobe Pattern Retrieval from Noisy Irregular Beam Data for the Planck Space Telescope

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…

Improved In-Flight Pattern Retrieval by Reflector Deformation Fitting

The in-flight pattern measurements of a sub-millimetre space telescope may be improved by determining the actual reflector anomalies and then include the knowledge to these in the final pattern de-termination. The pattern measurements with a celestial object as source often…

In-Flight Retrieval of Reflector Anomalies for the Planck Space Telescope

It is important to know the antenna patterns for the Planck Space Telescope with high accuracy for detectors operating at frequencies from 30 to 857 GHz. This could not be achieved with sufficient accuracy on ground as the working temperature…

Best-Fit Adjustments of the Reflectors in a Compact Range

ESA’s Compact Antenna Test Range at ESTEC has been relocated which has given the chance to improve the alignment of the reflectors. Based on measurements of the reflector surfaces the best-fit positions and orientations of the reflectors have been determined….

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