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- Higher-Order Basis Functions Applied to the Inverse Method of Moments for Inverse-Source Problems | TICRA

typically solved by the Method of Moments MoM This leads to higher accuracy and lower memory requirements when compared to a simple piecewise linear discretization e g RWG functions Typical applications of these techniques are antenna or scattering problems where the excitation is known and the radiated or scattered fields are desired The present paper investigates the use of higher order basis functions when applied to the Inverse MoM where

Original URL path: http://www.ticra.com/papers/higher-order-basis-functions-applied-inverse-method-moments-inverse-source-problems (2016-05-01)

Open archived version from archive - Papers tagged with : Diagnostics | TICRA

has been developed by TICRA The software reconstructs the field or the equivalent currents on a 18 Oct 2011 A Novel Accurate Pattern Fitting of Noisy Irregular Beam Data for the Planck Space Telescope Authors Oscar Borries Frank Jensen Per Heighwood Nielsen 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 18 Oct 2011 Grating Lobe Pattern Retrieval from Noisy Irregular Beam Data for the Planck Space Telescope Authors Per Heighwood Nielsen Oscar Borries Frank Jensen 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 11 Apr 2011 Accurate Fitting of Noisy Irregular Beam Data for the Planck Space Telescope Authors Oscar Borries Per Heighwood Nielsen Accurate fitting of the noisy irregular amplitude only main beam data is essential for the retrieval of the Planck space telescope geometry Therefore a novel two step fit ting algorithm which 11 Apr 2011 Advanced Processing of Measured Fields using Field Reconstruction Techniques Authors Erik Jørgensen Peter Meincke Cecilia Cappellin This contribution deals with the problem of reconstructing the extreme near field of an antenna starting from the field measured at a larger distance The presented method has several applications 10 Oct 2010 Improved In Flight Pattern Retrieval by Reflector Deformation Fitting Authors Frank Jensen Per Heighwood Nielsen 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 10 Oct 2010 Latest Achievements in Antenna Diagnostics and Processing of Measured Fields Authors Cecilia Cappellin Erik Jørgensen Peter Meincke A stand alone commercial program

Original URL path: http://www.ticra.com/papers/13?page=1 (2016-05-01)

Open archived version from archive - Papers tagged with : Diagnostics | TICRA

field of an antenna under test AUT measured in a Compact Antenna Test Range CATR on the basis of the known quiet 01 Nov 2009 An Accurate and Efficient Error Predictor Tool for CATR Measurements Authors Cecilia Cappellin Stig Busk Sørensen An accurate and efficient numerical model is developed to simulate the far field of an antenna under test AUT measured in a Compact Antenna Test Range CATR on the basis of the known quiet 11 Nov 2007 Diagnostics of the SMOS Radiometer Antenna System at the DTU ESA Spherical Near Field Antenna Test Facility Authors Cecilia Cappellin The recently developed Spherical Wave Expansion to Plane Wave Expansion SWE to PWE antenna diagnostics technique is employed in an investigation of the antenna system in the Microwave Imaging 04 Nov 2007 Application of the SWE to PWE Antenna Diagnostics Technique to an Offset Reflector Antenna Authors Cecilia Cappellin A new antenna diagnostics technique has been developed for the DTU ESA Spherical Near Field Antenna Test Facility at the Technical University of Denmark The technique is based on the 06 Nov 2006 The Influence of Finite Measurement Accuracy on the SWE to PWE Antenna Diagnostics Technique Authors Cecilia Cappellin A new antenna

Original URL path: http://www.ticra.com/papers/13?page=2 (2016-05-01)

Open archived version from archive - Efficient Body of Revolution Method of Moments for Rotationally Symmetric Antenna Systems with Offset Illumination | TICRA

Illumination Abstract An efficient Body of Revolution Method of Moments formulation is presented in which the unknown surface current density on the generatrix of the rotationally symmetric scatterer is expanded in terms of higher order hierarchical Legendre basis functions Careful attention has been paid to fast evaluation of the involved modal Green s functions The efficient formulation is particularly useful for the analysis of rotationally symmetric scatterers illuminated by an

Original URL path: http://www.ticra.com/papers/efficient-body-revolution-method-moments-rotationally-symmetric-antenna-systems-offset (2016-05-01)

Open archived version from archive - Novel Multi-Beam Radiometers for Accurate Ocean Surveillance | TICRA

Beam Radiometers for Accurate Ocean Surveillance Abstract Novel antenna architectures for real aperture multi beam radiometers providing high resolution and high sensitivity for accurate sea surface temperature SST and ocean vector wind OVW measurements are investigated On the basis of the radiometer requirements set for future SST OVW missions conical scanners and push broom antennas are compared The comparison will cover reflector optics and focal plane array configuration Publication Proc

Original URL path: http://www.ticra.com/papers/novel-multi-beam-radiometers-accurate-ocean-surveillance (2016-05-01)

Open archived version from archive - Efficient and Accurate Modeling of Electrically Large Dielectric Lens Antennas using Full-Wave Analysis | TICRA

efficient analysis methods for the accurate modeling of electrically large dielectric lens antennas are presented The first method is based on Double Physical Optics PO which takes into account an additional set of reflections within the lens whereas the conventional PO method only accounts for one set The second method relies on a higher order Body of Revolution Method of Moments and is capable of providing a full wave solution

Original URL path: http://www.ticra.com/papers/efficient-and-accurate-modeling-electrically-large-dielectric-lens-antennas-using-full-wave (2016-05-01)

Open archived version from archive - Papers tagged with : EM modelling | TICRA

paper presents examples of designs including shaped reflectors and a horn with a dielectric 08 Apr 2013 Domain Decomposition Technique for Efficient Analysis of Rotationally Symmetric Reflector Systems Containing 3D Structures Authors Erik Jørgensen Peter Meincke An efficient algorithm for analysis and optimization of rotationally symmetric reflector antennas possibly including 3D support structures and or waveguide components is presented The high 29 Oct 2012 Design Tool for High Performance Rotationally Symmetric Reflector Antennas Authors Erik Jørgensen Peter Meincke In this paper we present an efficient higher order BoR MoM in which the unknown surface current is discretized using hierarchical Legendre basis functions that are adapted to the circular 02 Oct 2012 An Accurate and Efficient Design Tool for Large Contoured Beam Reflectarrays Authors Min Zhou Stig Busk Sørensen Erik Jørgensen Peter Meincke An accurate and efficient tool for the design of contoured beam reflectarrays is presented It is based on the Spectral Domain Method of Moments the Local Periodicity approach and a minimax 13 Jul 2012 Advances in TICRA EM Tools Authors Hans Henrik Viskum Many exciting developments are underway at TICRA as evidenced by recent and upcoming releases of new EM tools One of the big news is the release of GRASP 10 which sets new standards for 12 Jul 2012 Design of Dual Polarized Contoured Beam Reflectarrays with Cross Polar and Sidelobe Suppression Authors Min Zhou Stig Busk Sørensen Peter Meincke Erik Jørgensen An efficient power pattern synthesis of contoured beam reflectarrays is presented Using the presented synthesis technique an offset dual polarized contoured beam reflectarray to cover an 04 Apr 2012 Higher Order Basis Functions Applied to the Inverse Method of Moments for Inverse Source Problems Authors Oscar Borries Erik Jørgensen Peter Meincke Higher order basis functions are commonly used for discretization of surface integral equations which

Original URL path: http://www.ticra.com/papers/9?page=1 (2016-05-01)

Open archived version from archive - Papers tagged with : EM modelling | TICRA

and in particular of reflectors for space antenna systems Recent modelling developments are exemplified ranging 18 Oct 2011 A Novel Accurate Pattern Fitting of Noisy Irregular Beam Data for the Planck Space Telescope Authors Oscar Borries Frank Jensen Per Heighwood Nielsen 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 18 Oct 2011 Analysis of reflectarrays using field symmetries Authors Niels Christian Albertsen 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 18 Oct 2011 Investigations on Accurate Analysis of Microstrip Reflectarrays Authors Min Zhou Stig Busk Sørensen An investigation on accurate analysis of microstrip reflectarrays is presented Sources of error in reflectarray analysis are examined and solutions to these issues are proposed The focus is on 18 Oct 2011 Processing of Measured Fields Using Advanced Inverse Method of Moments Algorithm Authors Erik Jørgensen Peter Meincke Oscar Borries 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 03 Jul 2011 Efficient Analysis of Reflector Antennas using GRASP Authors Erik Jørgensen Hans Henrik Viskum Stig Busk Sørensen Peter Meincke GRASP has for many years constituted the de facto standard in the space community for advanced reflector antenna modeling The tool has furthermore found widespread use in the earth station 02 Jun 2011 An Accurate Technique for Calculation of Radiation From Printed Reflectarrays Authors Min Zhou Stig Busk Sørensen Erik Jørgensen Peter Meincke The accuracy of various techniques for calculating the radiation from printed reflectarrays is examined and an improved technique based

Original URL path: http://www.ticra.com/papers/9?page=2 (2016-05-01)

Open archived version from archive