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- Stig Busk Sørensen | TICRA

waveguide systems based on Physical Optics and Complex Conical Beams The analysis procedure for one reflector consists of calculating the field 11 Apr 2011 Feed Array Design in Presence of Strong Scattering From Reflectors Authors Poul Erik Frandsen Stig Busk Sørensen Full wave reflectors antenna modelling especially when fed by strongly interacting radiating structures e g arrays coming into the reflector field of view can be a difficult task for a single 05 Oct 2010 Model Based System Engineering Components of Antennas Authors Stig Busk Sørensen Oscar Borries Very sophisticated antenna models are available today for the accurate prediction of antenna performances in particular those included in the European Antenna Modeling Library in which GRASP ADF 11 Jul 2010 Different Types of Circular Domain Wave objects Authors Stig Busk Sørensen This paper discusses a novel method for computing aperture radiated fields by means of two new types of circular domain beams with azimuthal phase variation These circular domain beams rigorously 12 Apr 2010 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 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 Lens Analysis Methods for Quasioptical Systems Authors Stig Busk Sørensen Knud Pontoppidan The Method of Moments MoM Physical Optics PO and Geometrical Optics GO are compared for analysis of dielectric lenses

Original URL path: http://www.ticra.com/company/staff/stig-busk-s-rensen?page=2 (2016-05-01)

Open archived version from archive - Stig Busk Sørensen | TICRA

Viskum A comparison of the Fast Fourier Transform FFT and direct numerical integration to solve the PO integral is presented with special emphasis on the achieved accuracy and the CPU time consumption 08 Jul 2001 Multi Moded Horns in Reflector Antenna Systems exemplified by the Planck Telescope Authors Stig Busk Sørensen Per Heighwood Nielsen Knud Pontoppidan In this paper bolometric detectors applied in conjunction with reflector antenna feed horns that support multiple modes are studied As an example the preliminary design of the Planck telescope 11 Jul 1999 A dual reflector system with a reconformable subreflector Authors Hans Henrik Viskum Stig Busk Sørensen Knud Pontoppidan The paper describes the design of a dual reflector spacecraft antenna with a circular main reflector aperture shaped to produce an elliptical beam A design is made with two different subreflector 19 Jun 1994 Dual Offset Shaped Reflectors Optimized for Gain and XPD performance Authors Hans Henrik Viskum Stig Busk Sørensen Contoured beam antennas may conveniently be designed by shaping the reflector surface to produce a gain pattern which closely resembles the prescribed coverage area The most appropriate technique 01 Oct 1993 Shaped Beam Antennas Reflector Surface Tolerance Effects Authors Knud Pontoppidan Stig Busk Sørensen

Original URL path: http://www.ticra.com/company/staff/stig-busk-s-rensen?page=3 (2016-05-01)

Open archived version from archive - Erik Jørgensen | TICRA

Borries Peter Meincke Erik Jørgensen Co authors P C Hansen Department of Applied Mathematics and Computer Science DTU Denmark The multi level fast multipole method MLFMM for a higher order HO discretization is demonstrated on high frequency HF problems illustrating for the first time how an efficient MLFMM for HO 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 Improved Multilevel Fast Multipole Method for Higher Order Discretizations Authors Oscar Borries Peter Meincke Erik Jørgensen Stig Busk Sørensen Co authors P C Hansen Department of Applied Mathematics and Computer Science DTU Denmark The Multilevel Fast Multipole Method MLFMM allows for a reduced computational complexity when solving electromagnetic scattering problems Combining this with the reduced number of unknowns 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 and Computer Science DTU Denmark The Physical Optics approximation is a widely used asymptotic method for calculating the scattering from electrically large bodies It requires significant computational work and little memory 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

Original URL path: http://www.ticra.com/company/staff/erik-j-rgensen?page=1 (2016-05-01)

Open archived version from archive - Erik Jørgensen | TICRA

recently measured at the DTU ESA Spherical Near Field Antenna Test Facility in 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 08 Apr 2013 Efficient Optimization of Large Reflectarrays Using Continuous Functions Authors Min Zhou Stig Busk Sørensen Erik Jørgensen Peter Meincke Two new efficient optimization schemes for direct optimization of printed reflectarrays are presented Instead of optimizing directly on the geometry of the array elements continuous functions 11 Feb 2013 Direct Optimization of Printed Reflectarrays for Contoured Beam Satellite Antenna Applications Authors Min Zhou Stig Busk Sørensen Erik Jørgensen Peter Meincke Co authors Oleksiy S Kim DTU Olav Breinbjerg DTU An accurate and efficient direct optimization technique for the design of contoured beam reflectarrays is presented It is based on the spectral domain method of moments assuming local periodicity 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 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 03 Oct 2012 Fast and Accurate Design Tool for Rotationally Symmetric Reflector Antennas with 3D Waveguide Components and Support Structures Authors Erik Jørgensen Peter Meincke We present a new efficient design tool for

Original URL path: http://www.ticra.com/company/staff/erik-j-rgensen?page=2 (2016-05-01)

Open archived version from archive - Erik Jørgensen | TICRA

surface integral equations which are typically solved by the Method of Moments MoM This leads to higher accuracy and lower 28 Mar 2012 Design and Analysis of Printed Reflectarrays with Irregularly Positioned Array Elements Authors Min Zhou Stig Busk Sørensen Peter Meincke Erik Jørgensen The design and analysis of printed reflectarrays with irregularly positioned array elements is presented An accurate and efficient power pattern synthesis procedure based on the Local 27 Mar 2012 New Modelling Capabilities in Commercial Software for High Gain Antennas Authors Erik Jørgensen Michael Lumholt Peter Meincke Min Zhou Stig Busk Sørensen Oscar Borries Cecilia Cappellin Poul Erik Frandsen This paper presents an overview of selected new modelling algorithms and capabilities in commercial software tools developed by TICRA A major new area is design and analysis of printed 03 Mar 2012 Antenna Diagnostics on Planar Arrays Using a 3D Source Reconstruction Technique and Spherical Near Field Measurements Authors Erik Jørgensen Peter Meincke Cecilia Cappellin Oscar Borries In this paper we apply a recently developed 3D source reconstruction algorithm to perform antenna diagnostics on a planar array configuration The test case is a planar X band slot array measured 18 Oct 2011 Application of Advanced Field Reconstruction Algorithms Authors Cecilia Cappellin Peter Meincke Erik Jørgensen Hans Henrik Viskum 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 18 Oct 2011 Recent Developments and Challenges for Reflector Antenna EM Modelling Authors Michael Lumholt Erik Jørgensen This paper concerns the EM modelling of high accuracy reflector antenna systems and in particular of reflectors for space antenna systems Recent modelling developments are exemplified ranging 18 Oct 2011 Processing of Measured Fields Using Advanced Inverse Method of Moments Algorithm Authors Erik Jørgensen

Original URL path: http://www.ticra.com/company/staff/erik-j-rgensen?page=3 (2016-05-01)

Open archived version from archive - Erik Jørgensen | TICRA

Zhou M History Papers 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 11 Apr 2011 Analysis of Printed Reflectarrays Using Extended Local Periodicity Authors Min Zhou Stig Busk Sørensen Erik Jørgensen Peter Meincke An analysis technique for improved modeling of a printed reflectarray is proposed The technique is based on a periodic approach where periodicity is applied on an extended unit cell which 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 performing advanced electromagnetic processing of measured data is being developed by TICRA The program reads the measured field and computes the extreme near 05 Oct 2010 Improved Source Reconstruction Technique for Antenna Diagnostics Authors Erik Jørgensen Peter Meincke Cecilia Cappellin This paper presents an improved inverse Method of Moment technique that allows surface currents to be reconstructed on the surface of an antenna The input to the algorithm is 01 Nov

Original URL path: http://www.ticra.com/company/staff/erik-j-rgensen?page=4 (2016-05-01)

Open archived version from archive - Oscar Borries | TICRA

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 Improved Multilevel Fast Multipole Method for Higher Order Discretizations Authors Oscar Borries Peter Meincke Erik Jørgensen Stig Busk Sørensen Co authors P C Hansen Department of Applied Mathematics and Computer Science DTU Denmark The Multilevel Fast Multipole Method MLFMM allows for a reduced computational complexity when solving electromagnetic scattering problems Combining this with the reduced number of unknowns 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 and Computer Science DTU Denmark The Physical Optics approximation is a widely used asymptotic method for calculating the scattering from electrically large bodies It requires significant computational work and little memory 06 Apr 2014 Improved Multilevel Fast Multipole Method for Higher Order Discretizations Authors Oscar Borries Peter Meincke Erik Jørgensen Stig Busk Sørensen The Multilevel Fast Multipole Method MLFMM allows for a reduced computational complexity when solving electromagnetic scattering problems Combining this with the reduced number of unknowns 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 are typically solved by the Method of

Original URL path: http://www.ticra.com/company/staff/oscar-borries?page=1 (2016-05-01)

Open archived version from archive - Oscar Borries | TICRA

P Nielsen P H Palvig M F Pontoppidan K Sejerøe T H Sørensen S B Vesterdal N Viskum H H Zhou M History Papers 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 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 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 05 Oct 2010 Model Based System Engineering Components of Antennas Authors Stig Busk Sørensen Oscar Borries

Original URL path: http://www.ticra.com/company/staff/oscar-borries?page=2 (2016-05-01)

Open archived version from archive