Mathias Fredrixon

Senior forskningsingenjör vid Onsala rymdobservatorium

Mathias är med och utvecklar mottagare för radioastronomi till teleskopen på Onsala, ALMA-teleskopet samt APEX-teleskopet, där han är med både i utveckling, tillverkning, tester samt installation.

I GARD-gruppen är Mathias bland annat ansvarig för framtagning av CAD-modeller, ritningar samt kontakt med mekaniska verkstäder.

Hans första uppdrag på Chalmers var satellitprojektet ODIN. Satelliten sköts upp 2001 och var utrustad med instrument för att mäta både på jordens atmosfär samt på intressanta områden i rymden i mm och sub-mm-området. Drygt 20 år senare fungerar ODIN fortfarande och förser forskarvärlden med värdefull data om jordens atmofär.

Arbetet i GARD-gruppen innefattar allt från att programmera och utföra mätningar i labbet till att installera mottagare för radioastronomi på 5100 meters höjd över havet i Chilenska Anderna i Sydamerika.​

Källa: chalmers.se
Image of Mathias Fredrixon

Visar 38 publikationer

2024

A Broad-Band Dual-Polarization All-Metal Dichroic Filter for Cryogenic Applications in Sub-THz Range

Daniel Montofre, Denis Meledin, Cristian Daniel López et al
IEEE Transactions on Terahertz Science and Technology. Vol. 14 (2)
Artikel i vetenskaplig tidskrift
2024

Setup for Measurement and Characterization of Cryogenic Low-Noise Receivers

Magnus Strandberg, Erik Sundin, Leif Helldner et al
2024 4th URSI Atlantic Radio Science Meeting, AT-RASC 2024
Paper i proceeding
2023

Vacuum-Seal Waveguide Feedthrough for Extended W-Band 67-116 GHz

Igor Lapkin, Cristian Daniel López, Mathias Fredrixon et al
IEEE Journal of Microwaves. Vol. 3 (3), p. 1014-1018
Artikel i vetenskaplig tidskrift
2023

SEPIA345: a dual polarization 2SB cartridge receiver for APEX telescope: Design and Performance

Denis Meledin, Igor Lapkin, Sven-Erik Ferm et al
Proceedings of the 32nd IEEE International Symposium on Space THz Technology
Paper i proceeding
2022

ALMA Band 2 Cold Cartridge Assembly Design

Victor Belitsky, Igor Lapkin, Mathias Fredrixon et al
32nd International Symposium of Space Terahertz Technology, ISSTT 2022
Paper i proceeding
2022

SEPIA345: a dual polarization 2SB cartridge receiver for APEX telescope: Design and Performance

Denis Meledin, Igor Lapkin, Sven-Erik Ferm et al
32nd International Symposium of Space Terahertz Technology, ISSTT 2022
Paper i proceeding
2022

ALMA Band 2 Receiver Automated Test System

J. Barkhof, R. Hesper, S. Realini et al
32nd International Symposium of Space Terahertz Technology, ISSTT 2022
Paper i proceeding
2022

SEPIA345: A 345 GHz dual polarization heterodyne receiver channel for SEPIA at the APEX telescope

Denis Meledin, Igor Lapkin, Mathias Fredrixon et al
Astronomy and Astrophysics. Vol. 668
Artikel i vetenskaplig tidskrift
2022

A broadband and dual-polarization single-layer dichroic filter for applications in Sub-THz range

Daniel Montofre, Igor Lapkin, Denis Meledin et al
32nd International Symposium of Space Terahertz Technology, ISSTT 2022
Paper i proceeding
2020

Wideband 67-116 GHz receiver development for ALMA Band 2

P. Yagoubov, T. Mroczkowski, Victor Belitsky et al
Astronomy and Astrophysics. Vol. 634
Artikel i vetenskaplig tidskrift
2019

New optics for SEPIA- Heterodyne facility instrument for the APEX telescope

Igor Lapkin, Sven-Erik Ferm, Mathias Fredrixon et al
ISSTT 2019 - 30th International Symposium on Space Terahertz Technology, Proceedings Book, p. 150-154
Paper i proceeding
2019

A 1mM SIS receiver utilizing different intermediate frequency (IF) configurations

Denis Meledin, Vincent Desmaris, Erik Sundin et al
ISSTT 2019 - 30th International Symposium on Space Terahertz Technology, Proceedings Book, p. 164-167
Paper i proceeding
2018

ALMA Band 5 receiver cartridge: Design, performance, and commissioning

Victor Belitsky, Maria Bylund, Vincent Desmaris et al
Astronomy and Astrophysics. Vol. 611
Artikel i vetenskaplig tidskrift
2018

SEPIA - A new single pixel receiver at the APEX telescope

Victor Belitsky, Igor Lapkin, Mathias Fredrixon et al
Astronomy and Astrophysics. Vol. 612
Artikel i vetenskaplig tidskrift
2016

Broken-step Phenomenon in SIS Mixers

Andrey Ermakov, Victor Belitsky, Parisa Yadranjee Aghdam et al
27th International Symposium on Space Terahertz Technology, ISSTT 2016, Nanjing, China
Paper i proceeding
2015

A new 3 mm band receiver for the Onsala 20 m antenna

Victor Belitsky, Igor Lapkin, Mathias Fredrixon et al
Astronomy and Astrophysics. Vol. 580
Artikel i vetenskaplig tidskrift
2014

Dual Band MM-Wave Receiver for Onsala 20 m Antenna

Igor Lapkin, Mathias Fredrixon, Erik Sundin et al
Proceedings of the TWENTY-FIFTH INTERNATIONAL SYMPOSIUM ON SPACE TERAHERTZ TECHNOLOGY, April 27-30, 2014, Moscow, Russia, p. 132-
Paper i proceeding
2012

Performance of the First ALMA Band 5 Production Cartridge

Bhushan Billade, Olle Nyström, Denis Meledin et al
IEEE Transactions on Terahertz Science and Technology. Vol. 2 (2), p. 208-214
Artikel i vetenskaplig tidskrift
2011

Performance of the first ALMA Band 5 production cartridge

Bhushan Billade, Olle Nyström, Denis Meledin et al
Proceedings of the 22nd International Symposium on Space Terahertz Technology, April 26-28th, 2011 - Tucson, Arizona, USA, p. 56-56
Paper i proceeding
2010

Design and performance of ALMA band 5 receiver cartridge

Victor Belitsky, Bhushan Billade, Vincent Desmaris et al
35th International Conference on Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2010, p. 1-2
Paper i proceeding
2010

Advanced Technologies for Radio Astronomy Instrumentation

Victor Belitsky, Bhushan Billade, Vincent Desmaris et al
Osservatorio Astronomico di Roma
Poster (konferens)
2010

Integrated Setup for THz Receiver Characterization

Olle Nyström, Hawal Marouf Rashid, Bhushan Billade et al
21st International Symposium on Space Terahertz Technology 2010, ISSTT 2010; Oxford; United Kingdom; 23 March 2010 through 25 March 2010, p. P6-4
Paper i proceeding
2010

Design and Performance of ALMA Band 5 Receiver Components

Bhushan Billade, Igor Lapkin, Olle Nyström et al
Osservatorio Astronomico di Roma
Poster (konferens)
2010

ALMA band 5 cartridge performance

Bhushan Billade, Igor Lapkin, Olle Nyström et al
21st International Symposium on Space Terahertz Technology 2010, ISSTT 2010; Oxford; United Kingdom; 23 March 2010 through 25 March 2010, p. 112-
Paper i proceeding
2009

Terahertz Instrumentation For Radio Astronomy

Victor Belitsky, Bhushan Billade, Vincent Desmaris et al
International Symposium on Terahertz Science and Technology between Japan and Sweden, p. 28-29
Övrigt konferensbidrag
2009

A 1.3-THz Balanced Waveguide HEB Mixer for the APEX Telescope

Denis Meledin, Alexey Pavolotskiy, Vincent Desmaris et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 57 (1), p. 89-98
Artikel i vetenskaplig tidskrift
2009

Optics Design and Verificatgion for the APEX Swedish Heterodyne Facility Instrument (SHeFI)

Olle Nyström, Igor Lapkin, Vincent Desmaris et al
Journal of Infrared, Millimeter, and Terahertz Waves. Vol. 30 (7), p. 746-761
Artikel i vetenskaplig tidskrift
2009

Prototype ALMA Band 5 Cartridge:Design and Performance

Victor Belitsky, Igor Lapkin, Bhushan Billade et al
Proceedings of the 20TH INTERNATIONAL SYMPOSIUM ON SPACE TERAHERTZ TECHNOLOGY, Charlottesville, VA, USA, April 20-22, 2009, s. 2-5
Paper i proceeding
2008

A Swedish heterodyne facility instrument for the APEX telescope

Vessen Vassilev, Denis Meledin, Igor Lapkin et al
Astronomy and Astrophysics. Vol. 490 (3), p. 1157-1163
Artikel i vetenskaplig tidskrift
2008

Optics Design and Verification for the APEX Swedish Heterodyne Facility Instrument (SHeFI)

Igor Lapkin, Olle Nyström, Vincent Desmaris et al
In Proceedings of The 19th International Symposium on Space Terahertz Technology, Groningen, 28-30 April, 2008, ed. W. Wild, Space Research Organization of the Netherlands (SRON). Vol. Part I, p. 351-357
Paper i proceeding
2008

APEX Band T2: A 1.25 – 1.39 THz Waveguide Balanced HEB Receiver

Denis Meledin, Vincent Desmaris, Sven-Erik Ferm et al
Proceedings of The 19th International Symposium on Space Terahertz Technology, Groningen, 28-30 April, 2008, ed. W. Wild, Space Research Organization of the Netherlands (SRON). Vol. part I, p. 162-166
Paper i proceeding
2007

Molecular oxygen in the p Ophiuchi cloud

B. Larsson, René Liseau, L. Pagani et al
Astronomy & Astrophysics. Vol. 466, p. 999-1003
Artikel i vetenskaplig tidskrift
2007

Facility Heterodyne Receiver for the Atacama Pathfinder Experiment Telescope

Victor Belitsky, Igor Lapkin, Vessen Vassilev et al
Proceedings of Joint 32nd International Conference on Infrared Millimeter Waves and 15th International conference on Terahertz Electronics, Sept 3-7, 2007, City Hall, Cardiff, Wales, UK, p. 326-328
Paper i proceeding
2006

A 0.8 mm heterodyne facility receiver for the APEX telescope

Christophe Risacher, Vessen Vassilev, Raquel Monje et al
Astronomy & Astrophysics. Vol. 454, p. L17-L20
Artikel i vetenskaplig tidskrift
2006

A 279-381 GHz SIS Receiver for the APEX Telescope

C. Risacher, Victor Belitsky, Igor Lapkin et al
Proceedings of the 16th International Symposium on Space Terahertz Technology, Chalmers University of Technology, Gothenburg, Sweden, May 2-4, 2005, p. 432-437
Övrigt konferensbidrag
2004

A Gaussian Beam Measurement Range for mm and Sub-mm Receivers

Miroslav Pantaleev, Victor Belitsky, Karsten Ermisch et al
in “Proceedings of Fifteenth International Symposium on Space Terahertz Technology” Massachusetts, USA, p. www.stt.2004.org/-
Övrigt konferensbidrag
2004

Measurement Results of Gaussian Beam Verification for HIFI Instrument of Herschel Space Observatory

Miroslav Pantaleev, Karsten Ermisch, Mathias Fredrixon et al
in “Proceedings of SPIE in Modeling and Systems Engineering for Astronomy”. Vol. 5497, p. 586-595
Paper i proceeding
2003

The Odin satellite - I. Radiometer design and test

U. Frisk, MAGNE HAGSTRÖM, J. Ala-Laurinaho et al
Astronomy and Astrophysics. Vol. 402 (3), p. L27-L34
Artikel i vetenskaplig tidskrift

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