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  • Papers tagged with : Cross polarization | TICRA
    Heighwood Nielsen 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 04 Nov 2007 Polarisation Dependent Scattering from the Serrations of Compact Ranges Authors Frank Jensen Serrations are often applied at the edges of compact range reflectors in order to reduce the scattering from the edges into the quiet zone At low frequencies the serrations show different 18 Sep 2002 A systematic approach to the analysis of polarisation sensitive reflector Authors Hans Henrik Viskum 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 10 Sep 2000 Guidelines for the design of the serrations of a compact range Authors Knud Pontoppidan Per Heighwood Nielsen Compact ranges based on reflector technology may be based on different designs single offset reflec tor dual offset reflector compensated for cross polarisation or an offset dual reflector 16 Jul 2000 Improved Compact Antenna Test Range CATR Performance by Using Spherical Angular Function SAF Deconvolution Method Authors Frank Jensen Microwave antenna measurements seek to determine the response of an Antenna Under Test AUT when it is illuminated by a uniform Plane Wave The requirement of a uniform Plane Wave illumination 18 Jun 1995 A Study on the Isolation Capability of Multi Beam Reflector Antennas Authors Hans Henrik Viskum The paper demonstrates how multi beam antennas used for contoured beams in communications satellites are capable of providing very high isolation to adjacent service areas even with antenna 18 Jun 1995 Fade Compensation in Antenna Optimization Authors Hans Henrik Viskum Contoured beam satellite antennas are usually designed by optimizing the antenna gain pattern over the desired

    Original URL path: http://ticra.com/papers/6 (2016-05-01)
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  • Papers tagged with : Diagnostics | TICRA
    noisy field is then given as input to the 3D reconstruction of DIATOOL and the SWE 07 Apr 2014 Field Reconstruction and Estimation of the Antenna Support Structure Effect on the Measurement Uncertainty of the BTS1940 Antenna Authors Cecilia Cappellin The 3D reconstruction algorithm of DIATOOL is applied to the BTS1940 antenna recently measured at the DTU ESA Spherical Near Field Antenna Test Facility in Denmark The antenna was measured 06 Oct 2013 Detailed Diagnostics of the BIOMASS Feed Array Prototype Authors Cecilia Cappellin Knud Pontoppidan The 3D reconstruction algorithm of DIATOOL is applied to the prototype feed array of the BIOMASS synthetic aperture radar recently measured at the DTU ESA Spherical Near Field Antenna Test 10 Sep 2013 Array Diagnostics Spatial Resolution and Filtering of Undesired Radiation with the 3D Reconstruction Algorithm Authors Cecilia Cappellin Erik Jørgensen Peter Meincke This paper focuses on three important features of the 3D reconstruction algorithm of DIATOOL the identification of array elements improper functioning and failure the obtainable spatial 08 Apr 2013 Diagnostics of the BIOMASS Feed Array Prototype Authors Cecilia Cappellin Knud Pontoppidan Erik Jørgensen Peter Meincke The 3D reconstruction algorithm is applied to the prototype feed array of the BIOMASS synthetic aperture radar recently measured at the DTU ESA Spherical Near Field Antenna Test Facility in 21 Oct 2012 Array Antenna Diagnostics with the 3D Reconstruction Algorithm Authors Cecilia Cappellin Peter Meincke Erik Jørgensen The 3D reconstruction algorithm is applied to a slotted waveguide array measured at the DTU ESA Spherical Near Field Antenna Test Facility One slot of the array is covered by conductive tape and 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

    Original URL path: http://ticra.com/papers/13 (2016-05-01)
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  • Papers tagged with : Domain decomposition | TICRA
    Computational Electromagnetics Corrugated horn antenna Cross polarization Diagnostics Domain decomposition EM modelling Graphical Processing Units GTD Measurement Method of Moments MM wave Mode matching Multilevel Fast Multipole Method Near field Optimization Physical Optics Reflectarray Reflector antenna Scattering Papers tagged with

    Original URL path: http://ticra.com/papers/41 (2016-05-01)
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  • Papers tagged with : EM modelling | TICRA
    11 Oct 2015 Design and Validation of Compact Antenna Test Ranges using Computational EM Authors Oscar Borries Peter Meincke Erik Jørgensen Hans Henrik Viskum Frank Jensen Co authors C H Schmidt Airbus Defence Space Munich Germany 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 06 Oct 2015 Full Wave Simulation of Large Satellite for the Evaluation of Multiple Frequency Antennas Interference Authors Erik Jørgensen Co authors Benedetta Fiorelli The paper presents a full wave simulation of the spacecraft of JUICE ESA s Jupiter Icy moons Explorer mission Results prove the possibility of simulating the entire spacecraft modelling the 19 Jul 2015 Higher Order Method of Moments Analysis for Unconnected Quadrilateral Meshes Authors Peter Meincke Erik Jørgensen Oscar Borries A higher Order HO quadrilateral mesher is presented along with a HO method of moments formulation for unconnected meshes A numerical example is presented to validate the new formulation 12 Apr 2015 Design of a Push Broom Multi Beam Radiometer for Future Ocean Observations Authors Cecilia Cappellin Knud Pontoppidan Per Heighwood Nielsen Co authors N Skou S S Søbjærg A Ihle M Ivashina O Iupikov K v t Klooster The design of a push broom multi beam radiometer for future ocean observations is described The radiometer provides a sensitivity one order of magnitude higher than a traditional conical scanning 12 Apr 2015 Detailed Pattern Computations of the UHF Antennas on the Spacecraft of the ExoMars Mission Authors Cecilia Cappellin Erik Jørgensen Peter Meincke Oscar Borries Co authors C Nardini C Dreyer This paper describes the pattern computations of the UHF antennas mounted on the spacecraft of the EXOMARS mission The analyses are made by the higher order Method of Moments MoM

    Original URL path: http://ticra.com/papers/9 (2016-05-01)
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  • Papers tagged with : Graphical Processing Units | TICRA
    field Optimization Physical Optics Reflectarray Reflector antenna Scattering Papers tagged with Graphical Processing Units 07 Apr 2014 Reflector Antenna Analysis using Physical Optics on Graphics Processing Units Authors Oscar Borries Erik Jørgensen Peter Meincke Stig Busk Sørensen Co authors H H B Sørensen Department of Applied Mathematics and Computer Science DTU Denmark B Dammann Department of Applied Mathematics and Computer Science DTU Denmark P C Hansen Department of Applied Mathematics

    Original URL path: http://ticra.com/papers/43 (2016-05-01)
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  • Papers tagged with : GTD | TICRA
    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 06 Nov 2006 Combining GTD with Mom in Analysing the Scattering from the LICEF Antennas on the SMOS Satellite Authors Frank Jensen Knud Pontoppidan The present paper describes the determination of the scattering from the LICEF antenna elements on the SMOS satellite taking into account that the solar panels rotate during the flight of the 31 May 2005 Scattering from a Low Orbiting Satellite with Rotating Solar Array Authors Frank Jensen The radiation patterns of satellite antennas may be highly influenced by scattering in the satellite its payload and its solar array By ray tracing techniques GO GTD and applying orbit 23 Feb 2005 Scattering From a Low Orbiting Satellite with Rotating Solar Array Authors Frank Jensen The radiation patterns of satellite antennas may be highly influenced by scattering in the satellite its payload and its solar array By ray tracing techniques and ap plying orbit data it is 04 Oct 1999 Modelling of Compact Range Quiet Zone Fields by PO and GTD Authors Frank Jensen Modelling of the field in the quiet zone QZ of a compact range is a difficult task since the edges of the range reflectors are designed not to radiate into the quiet zone As a consequence the 01 Jun 1997 Diffraction by a quarterplane of the field from a halfwave dipole Authors Niels Christian Albertsen The scattered far field from a halfwave dipole illuminating a perfectly conducting quarterplane is calculated The calculation is based on a calculation of the radial electric and magnetic field 28 Jun 1993 A dual offset shaped reflector with a tilted elliptical main reflector Authors Hans Henrik Viskum Spacecraft antennas with elliptical beams

    Original URL path: http://ticra.com/papers/18 (2016-05-01)
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  • Papers tagged with : Measurement | TICRA
    2014 DTU ESA Millimeter Wave Validation Standard Antenna Requirements and Design Authors Niels Vesterdal Rolf Jørgensen Co authors Sergey Pivnenko Dept of Electrical Engng TUD Denmark Oleksiy Kim Dept of Electrical Engng TUD Denmark Olav Breinbjerg Dept of Electrical Engng TUD Denmark K Branner Dept of Wind Energy TUD Denmark C M Markussen Dept of Wind Energy TUD Denmark M Paquay ESA ESTEC The Netherlands Inter comparisons and validations of antenna measurement ranges are useful tools allowing the detection of various problems in the measurement procedures thus leading to improvements of the 07 Apr 2014 Field Reconstruction and Estimation of the Antenna Support Structure Effect on the Measurement Uncertainty of the BTS1940 Antenna Authors Cecilia Cappellin The 3D reconstruction algorithm of DIATOOL is applied to the BTS1940 antenna recently measured at the DTU ESA Spherical Near Field Antenna Test Facility in Denmark The antenna was measured 06 Oct 2013 Detailed Diagnostics of the BIOMASS Feed Array Prototype Authors Cecilia Cappellin Knud Pontoppidan The 3D reconstruction algorithm of DIATOOL is applied to the prototype feed array of the BIOMASS synthetic aperture radar recently measured at the DTU ESA Spherical Near Field Antenna Test 06 Oct 2013 A Detailed PO PTD GRASP Simulation Model for Compensated Compact Range Analysis with Arbitrarily Shaped Serrations Authors Hans Henrik Viskum Co authors Carsten Schmidt A Geise Astrium GmbH Compensated compact ranges offer accurate testing techniques for large devices under test The quiet zone field performance is affected by diffracted field components from the sub and main 10 Sep 2013 Array Diagnostics Spatial Resolution and Filtering of Undesired Radiation with the 3D Reconstruction Algorithm Authors Cecilia Cappellin Erik Jørgensen Peter Meincke This paper focuses on three important features of the 3D reconstruction algorithm of DIATOOL the identification of array elements improper functioning and failure the obtainable

    Original URL path: http://ticra.com/papers/16 (2016-05-01)
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  • Papers tagged with : Method of Moments | TICRA
    Higher Order Method of Moments Analysis for Unconnected Quadrilateral Meshes Authors Peter Meincke Erik Jørgensen Oscar Borries A higher Order HO quadrilateral mesher is presented along with a HO method of moments formulation for unconnected meshes A numerical example is presented to validate the new formulation 12 Apr 2015 Detailed Pattern Computations of the UHF Antennas on the Spacecraft of the ExoMars Mission Authors Cecilia Cappellin Erik Jørgensen Peter Meincke Oscar Borries Co authors C Nardini C Dreyer This paper describes the pattern computations of the UHF antennas mounted on the spacecraft of the EXOMARS mission The analyses are made by the higher order Method of Moments MoM add on to 12 Apr 2015 DTU ESA Millimeter Wave Validation Standard Antenna mm VAST Detailed Design Authors Rolf Jørgensen Niels Vesterdal Co authors Oleksiy S Kim Sergey Pivnenko Olav Breinbjerg Kim Branner Peter Berring Christen Malte Markussen Maurice Paquay This paper describes the structural solution to meet these extremely strict stability requirements and the structural analyses done in order to verify that they can be met The paper also 12 Apr 2015 New Fast and Robust Modelling Algorithms for Electrically Large Antennas and Platforms Authors Erik Jørgensen Oscar Borries Peter Meincke Min Zhou Niels Vesterdal This paper presents two new modelling algorithms that were recently added to the commercially available GRASP software package for electrically large antenna and scattering problems In particular 06 Nov 2014 Efficient Body of Revolution Method of Moments for Rotationally Symmetric Antenna Systems with Offset Illumination Authors Peter Meincke Erik Jørgensen 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 17 Oct 2014 Integral Equation Modelling of Reverberation Chambers using Higher Order Basis Functions Authors Oscar Borries

    Original URL path: http://ticra.com/papers/8 (2016-05-01)
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