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Alec Josaitis
Researcher at University of Cambridge
Publications - 14
Citations - 184
Alec Josaitis is an academic researcher from University of Cambridge. The author has contributed to research in topics: Reionization & Antenna (radio). The author has an hindex of 6, co-authored 10 publications receiving 91 citations. Previous affiliations of Alec Josaitis include University of Michigan.
Papers
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Proceedings ArticleDOI
The Design and Characterization of Wideband Spline-profiled Feedhorns for Advanced Actpol
Sara M. Simon,Jason E. Austermann,James A. Beall,Steve K. Choi,Kevin Coughlin,Shannon M. Duff,Patricio A. Gallardo,Shawn W. Henderson,Felicity B. Hills,Shuay-Pwu Patty Ho,Johannes Hubmayr,Alec Josaitis,Brian J. Koopman,Jeff McMahon,Federico Nati,Laura Newburgh,Michael D. Niemack,Maria Salatino,Alessandro Schillaci,Benjamin L. Schmitt,Suzanne T. Staggs,Eve M. Vavagiakis,Jonathan T. Ward,Edward J. Wollack +23 more
TL;DR: In this article, a wideband spline-profiled feedhorn was developed and optimized for the AdvACT multichroic arrays that maximize coupling efficiency while carefully controlling polarization systematics.
Journal ArticleDOI
Understanding the HERA Phase i receiver system with simulations and its impact on the detectability of the EoR delay power spectrum
Nicolas Fagnoni,Eloy de Lera Acedo,David DeBoer,Zara Abdurashidova,James E. Aguirre,Paul Alexander,Zaki S. Ali,Yanga Balfour,Adam P. Beardsley,Gianni Bernardi,Gianni Bernardi,Tashalee S. Billings,Judd D. Bowman,Richard F. Bradley,Phil Bull,Jacob Burba,Chris Carilli,Carina Cheng,Matt Dexter,Joshua S. Dillon,Aaron Ewall-Wice,Randall Fritz,Steve R. Furlanetto,Kingsley Gale-Sides,Brian Glendenning,Deepthi Gorthi,Bradley Greig,Jasper Grobbelaar,Ziyaad Halday,Bryna J. Hazelton,Jacqueline N. Hewitt,Jack Hickish,Daniel C. Jacobs,Alec Josaitis,Austin Julius,Nicholas S. Kern,Joshua Kerrigan,Honggeun Kim,Piyanat Kittiwisit,Piyanat Kittiwisit,Saul A. Kohn,Matthew Kolopanis,Adam Lanman,Paul La Plante,Telalo Lekalake,Adrian Liu,David MacMahon,Lourence Malan,Cresshim Malgas,Matthys Maree,Zachary E. Martinot,Eunice Matsetela,Juan Mena Parra,Andrei Mesinger,Mathakane Molewa,Miguel F. Morales,Tshegofalang Mosiane,Abraham R. Neben,Bojan Nikolic,Aaron R. Parsons,Nipanjana Patra,Samantha Pieterse,Jonathan C. Pober,Nima Razavi-Ghods,James Robnett,Kathryn Rosie,Peter Sims,Craig Smith,Angelo Syce,Nithyanandan Thyagarajan,Nithyanandan Thyagarajan,Peter K. G. Williams,Haoxuan Zheng +72 more
TL;DR: In this paper, the authors combine detailed electromagnetic and electrical simulations in order to model the chromatic effects of the instrument, and quantify its frequency and time responses, in particular, the effect of the analogue receiver, transmission cables, and mutual coupling.
Journal ArticleDOI
Wideband 67-116 GHz receiver development for ALMA Band 2
Pavel A. Yagoubov,Tony Mroczkowski,Victor Belitsky,D. Cuadrado-Calle,F. Cuttaia,Gary A. Fuller,Juan Daniel Gallego,Alvaro Gonzalez,Keiko Kaneko,Patricio Mena,R. Molina,Renzo Nesti,V. Tapia,Fabrizio Villa,Maria T. Beltrán,Francesco Cavaliere,J. Ceru,Grace E. Chesmore,Kevin Coughlin,C. De Breuck,Mathias Fredrixon,Danielle George,H. Gibson,Joseph E. Golec,Alec Josaitis,Francisca Kemper,Francisca Kemper,Mikko Kotiranta,Igor Lapkin,I. Lopez-Fernandez,Gianni Marconi,S. Mariotti,William McGenn,Jeff McMahon,Axel Murk,F. Pezzotta,Neil M. Phillips,Nicolas Reyes,S. Ricciardi,M. Sandri,Magnus Strandberg,Luca Terenzi,Leonardo Testi,B. Thomas,Yoshinori Uzawa,D. Vigano,Niklas Wadefalk +46 more
TL;DR: This design anticipates new ALMA requirements following the recommendations of the 2030 ALMA Development Roadmap and produces a wideband, tuneable, sideband-separating receiver with 28 GHz of instantaneous bandwidth per polarisation operating in the sky frequency range of 67-116 GHz.
Posted Content
Electrical and electromagnetic co-simulations of the HERA Phase I receiver system including the effects of mutual coupling, and impact on the EoR window
Nicolas Fagnoni,Eloy de Lera Acedo,David DeBoer,Zara Abdurashidova,James E. Aguirre,Paul Alexander,Zaki S. Ali,Yanga Balfour,Adam P. Beardsley,Gianni Bernardi,Tashalee S. Billings,Judd D. Bowman,Richard F. Bradley,Phil Bull,Jacob Burba,Chris Carilli,Carina Cheng,Matt Dexter,Joshua S. Dillon,Aaron Ewall-Wice,Randall Fritz,Steve R. Furlanetto,Kingsley Gale-Sides,Brian Glendenning,Deepthi Gorthi,Bradley Greig,Jasper Grobbelaar,Ziyaad Halday,Bryna J. Hazelton,Jacqueline N. Hewitt,Jack Hickish,Daniel C. Jacobs,Alec Josaitis,Austin Julius,Nicholas S. Kern,Joshua Kerrigan,Honggeun Kim,Piyanat Kittiwisit,Saul A. Kohn,Matthew Kolopanis,Adam Lanman,Paul La Plante,Telalo Lekalake,Adrian Liu,David MacMahon,Lourence Malan,Cresshim Malgas,Matthys Maree,Zachary E. Martinot,Eunice Matsetela,Juan Mena Parra,Andrei Mesinger,Mathakane Molewa,Miguel F. Morales,Tshegofalang Mosiane,Abraham R. Neben,Bojan Nikolic,Aaron R. Parsons,Nipanjana Patra,Samantha Pieterse,Jonathan C. Pober,Nima Razavi-Ghods,James Robnett,Kathryn Rosie,Peter Sims,Craig Smith,Angelo Syce,Nithyanandan Thyagarajan,Peter K. G. Williams,Haoxuan Zheng +69 more
TL;DR: In this article, a method to simulate the frequency and time responses of an antenna, by simultaneously taking into account the analogue RF receiver, the transmission cable, and the mutual coupling caused by adjacent antennas, is presented.
Journal ArticleDOI
The REACH radiometer for detecting the 21-cm hydrogen signal from redshift z ≈ 7.5–28
Eloy de Lera Acedo,Dirk I. L. de Villiers,Nima Razavi-Ghods,Will Handley,Anastasia Fialkov,Alessio Magro,D. A. Anstey,H.T.J. Bevins,Riccardo Chiello,J. Cumner,Alec Josaitis,I. L. V. Roque,Peter Sims,Kilian H. Scheutwinkel,Paul Alexander,Gianni Bernardi,Steven Carey,Jean Cavillot,W. Croukamp,John Ely,Thomas Gessey-Jones,Quentin Gueuning,R. Hills,Gauri V. Kulkarni,Roberto Maiolino,P. Daniel Meerburg,Shikhar Mittal,Jonathan K. Pritchard,Ewald Puchwein,A. Saxena,E Shen,Oleg Smirnov,M. Spinelli,Kristian Zarb-Adami +33 more
TL;DR: The Radio Experiment for the Analysis of Cosmic Hydrogen (REACH) is a sky-averaged 21 cm experiment aiming at improving the current observations by tackling the issues faced by current instruments related to residual systematic signals in the data as mentioned in this paper .