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  • Full Wave Simulation of Large Satellite for the Evaluation of Multiple Frequency Antennas Interference | TICRA
    Results prove the possibility of simulating the entire spacecraft modelling the instruments of the payload in a realistic environment to predict unwanted interference and consequent unexpected RF behaviour that would be impossible to be foreseen by either stand alone or simplified configuration of the antennas on board The simulations are performed making use of the new full wave analysis tool available in TICRA s GRASP and show the capability of

    Original URL path: http://www.ticra.com/papers/full-wave-simulation-large-satellite-evaluation-multiple-frequency-antennas-interference (2016-05-01)
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  • Higher-Order Method of Moments Analysis for Unconnected Quadrilateral Meshes | TICRA
    matching Multilevel Fast Multipole Method Near field Optimization Physical Optics Reflectarray Reflector antenna Scattering Higher Order Method of Moments Analysis for Unconnected Quadrilateral Meshes Abstract 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 Publication Proc 2015 IEEE AP S Symposium on Antennas and Propagation Place Vancouver British Columbia Canada

    Original URL path: http://www.ticra.com/papers/higher-order-method-moments-analysis-unconnected-quadrilateral-meshes (2016-05-01)
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  • Structural Design of the DTU-ESA MM-Wave Validation Standard Antenna | TICRA
    inter comparisons and validation of antenna test facilities is under development in cooperation between DTU and TICRA under a contract from the European Space Agency The antenna is designed to be extremely thermally and mechanically stable in the range of temperatures 20 5 C under arbitrary orientation in the gravity field The antenna has a characteristic length of approximately 500mm And in order to obtain very low measuring error the allowable deformations of the reflector and feeds are down to 2 5μm The antenna is modelled structurally using the commercial finite element package MSC Patran with MSC MARC as solver The solid parts of the antenna are meshed with 10 noded tetrahedral elements which have quadratic shape functions and the entire model has approximately 325 000 elements The individual solid part of the antenna is connected via a glued contact formulation in MSC MARC Because of the size and the complexity of the model a computer cluster is applied to solve the analyses 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 discusses the challenges of integrating an aluminum

    Original URL path: http://www.ticra.com/papers/structural-design-dtu-esa-mm-wave-validation-standard-antenna (2016-05-01)
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  • Rolf Jørgensen | TICRA
    1977 Phone direct 45 3330 6749 Has been engaged in satellite antenna contoured beam design and development of computer code to support this design Has developed code for analysis of multibeam satellite antenna systems Is currently taking care of customer relations in connection with software delivery and support Papers 19 Jul 2015 Structural Design of the DTU ESA MM Wave Validation Standard Antenna Authors Rolf Jørgensen Co authors K Branner P Berring C M Markussen O S Kim S Pivnenko O Breinbjerg A new specially designed antenna to be used for inter comparisons and validation of antenna test facilities is under development in cooperation between DTU and TICRA under a contract from the 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 Oct 2014 DTU ESA Millimeter Wave Validation Standard Antenna Requirements and Design Authors Niels Vesterdal Rolf Jørgensen Co authors

    Original URL path: http://www.ticra.com/company/staff/rolf-j-rgensen (2016-05-01)
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  • Design and Optimization of a Single-Layer Planar Transmit-Receive Contoured Beam Reflectarray with Enhanced Performanc | TICRA
    planar contoured beam reflectarray in Ku band The reflectarray is optimized to fulfill the requirements of a Direct Broadcast Satellite mission which covers a South American coverage in both transmit and receive frequency bands for dual linear polarization The reflectarray is designed using a direct optimization approach where all the array elements are optimized simultaneously thus resulting in a design with enhanced performance compared to designs obtained using a phase

    Original URL path: http://www.ticra.com/papers/design-and-optimization-single-layer-planar-transmit-receive-contoured-beam-reflectarray (2016-05-01)
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  • Papers | TICRA
    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 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 add on to 12 Apr 2015 Analysis and Optimization of a Curved Transmit Receive Contoured Beam Reflectarray Authors Min Zhou Stig Busk Sørensen Oscar Borries Erik Jørgensen This paper presents the analysis and optimization of a 1 meter single layer curved contoured beam reflectarray in Kuband The curved reflectarray is designed to radiate a contoured beam over a 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 Filtering of Measurement Noise with the 3D Reconstruction Algorithm Authors Cecilia Cappellin Two different antenna models are set up in GRASP and CHAMP and noise is added

    Original URL path: http://www.ticra.com/papers?page=1 (2016-05-01)
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  • Papers | TICRA
    Coverage Contoured Beam Reflectarray Authors Min Zhou Stig Busk Sørensen The design and optimization of a single layer multifaceted dual polarization contoured beam reflectarray with different coverages in each polarization has been presented The reflectarray is 07 Jul 2014 Gaussian Translation Operator for Multi Level Fast Multipole Method Authors Oscar Borries Stig Busk Sørensen Peter Meincke Erik Jørgensen Co authors P C Hansen Department of Applied Mathematics and Computer Science DTU Denmark Results using a new translation operator for the Multi Level Fast Multipole Method are presented Based on Gaussian beams the translation operator allows a significant portion of the plane wave 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 07 Apr 2014 Generalized Admittance Matrix Method for Fast Full Wave Analysis of Integrated Lens Antennas Authors Erik Jørgensen Peter Meincke This paper presents an efficient technique for full wave analysis of dielectric lenses with integrated feeding The feeding section is analysed with a higher order 3D MoM algorithm while the 07 Apr 2014 Design and Optimization of Multi Faceted Reflectarrays for Satellite Applications Authors Min Zhou Peter Meincke Erik Jørgensen Stig Busk Sørensen The design and optimization of multi faceted reflectarrays for satellite applications are presented The objective of this work is to investigate the performance of a multi faceted reflectarray 07 Apr 2014 Efficient and Accurate Modeling of Electrically Large Dielectric Lens Antennas using Full Wave Analysis Authors Min Zhou Stig Busk Sørensen Peter Meincke Two efficient analysis methods for the accurate modeling of electrically large dielectric lens antennas are presented The

    Original URL path: http://www.ticra.com/papers?page=2 (2016-05-01)
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  • Papers | TICRA
    the reduced number of unknowns 27 Mar 2014 The Generalized Direct Optimization Technique for Printed Reflectarrays Authors Min Zhou Stig Busk Sørensen Erik Jørgensen Peter Meincke Co authors Oleksiy S Kim DTU Olav Breinbjerg DTU Giovanni Toso ESTEC A generalized direct optimization technique GDOT for the design of printed reflectarrays using arbitrarily shaped elements with irregular orientation and position is presented The GDOT is based 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 spatial 07 Jul 2013 CHAMP The Dedicated Design Tool for Rotationally Symmetric Horns and Reflector Terminals Authors Hans Henrik Viskum A fast and accurate approach to designing horns and reflectors is implemented in the CHAMP code The paper presents examples of designs including shaped reflectors and a horn with a dielectric 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

    Original URL path: http://www.ticra.com/papers?page=3 (2016-05-01)
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