Prof. Ricardo Finger Profile

Prof. Ricardo Finger

Assistant Professor at Univ de Chile

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Author

Publications (11)

Proceedings Article | 2 September 2022 Presentation + Paper

ALMA Band-1 (35-50GHz) receiver: first light, performance, and road to completion

Yau-De Huang, Yuh-Jing Hwang, Chau-Ching Chiong, Hsi-Wei Yen, Patrick Michel Koch, Chi-Den Huang, Bill Liu, Cheng Lin Chen, Jwu Jiun Tsai, Wei-Ling Hsiung, Li-Pin Chi, Chin-Ting Ho, Chao-Chin Wang, Chen Chien, You-Hua Chu, Paul Ho, Francisca Kemper, Oscar Morata, Alvaro Gonzalez, Satoru Iguchi, Yoshi Uzawa, Daisuke Iono, Hiroshi Nagai, John Effland, Kamaljeet Saini, Marian Pospieszalski, Doug Henke, Keith Yeung, Ricardo Finger, Valeria Tapia, Nicolas Reyes, Giorgio Siringo, Gianni Marconi, Rodrigo Cabezas

Proceedings Volume 12190, 121900K (2022) https://doi.org/10.1117/12.2629766

KEYWORDS: Receivers, Optical amplifiers, Radio astronomy, Antennas, Astronomy, Observatories, Cryogenics, Simulation of CCA and DLA aggregates, Roads, Galactic astronomy

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SPIE Journal Paper | 23 June 2022

Digital calibration test results for Atacama Large Millimeter/submillimeter Array band 7+8 sideband separating receiver

Franco Curotto, Ricardo Finger, Takafumi Kojima, Kazunori Uemizu, Álvaro González, Yoshinori Uzawa, Leonardo Bronfman

JATIS, Vol. 8, Issue 02, 024004, (June 2022) https://doi.org/10.1117/12.10.1117/1.JATIS.8.2.024004

KEYWORDS: Calibration, Receivers, Field programmable gate arrays, Astronomy, Analog electronics, Signal processing, Phase measurement, Double sideband modulation, Dynamical systems, Waveguides

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Proceedings Article | 9 July 2018 Paper

Performance of pre-production band 1 receiver for the Atacama Large Millimeter/submillimeter Array (ALMA)

Yau-De (Ted) Huang, Oscar Morata, Patrick Michel Koch, Ciska Kemper, Yuh-Jing Hwang, Chau-Ching Chiong, Paul T. Ho, You-Hua Chu, Chi-Den Huang, Ching-Tang Liu, Fang-Chia Hsieh, Yen-Hsiang Tseng, Chia-Hsiang Yang, Jinn jy Tsay, Tsu Chang, Chin-Ting Ho, Po-Han Chiang, Chih-Cheng Chang, Shou-Ting Jian, Sung-Po Hsu, Chen Chien, Satoru Iguchi, Shin'ichiro Asayama, Daisuke Iono, Alvaro Gonzalez, John Effland, Kamaljeet Saini, Marian Pospieszalski, Doug Henke, Keith Yeung, Ricardo Finger, Valeria Tapia, Nicolas Reyes

Proceedings Volume 10708, 1070833 (2018) https://doi.org/10.1117/12.2310127

KEYWORDS: Receivers, Radio astronomy, Astronomy

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Proceedings Article | 10 August 2016 Paper

The Atacama Large Millimeter/sub-millimeter Array band-1 receiver

Yau De (Ted) Huang, Oscar Morata, Patrick Michel Koch, Ciska Kemper, Yuh-Jing Hwang, Chau-Ching Chiong, Paul Ho, You-Hua Chu, Chi-Den Huang, Ching-Tang Liu, Fang-Chia Hsieh, Yen-Hsiang Tseng, Shou-Hsien Weng, Chin-Ting Ho, Po-Han Chiang, Hsiao-Ling Wu, Chih-Cheng Chang, Shou-Ting Jian, Chien-Feng Lee, Yi-Wei Lee, Satoru Iguchi, Shin'ichiro Asayama, Daisuke Iono, Alvaro Gonzalez, John Effland, Kamaljeet Saini, Marian Pospieszalski, Doug Henke, Keith Yeung, Ricardo Finger, Valeria Tapia, Nicolas Reyes

Proceedings Volume 9911, 99111V (2016) https://doi.org/10.1117/12.2232193

KEYWORDS: Receivers, Optical amplifiers, Radio astronomy, Prototyping, Astronomy, Galactic astronomy, Optical isolators, Cryogenics, Observatories, Carbon monoxide

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Proceedings Article | 19 July 2016 Paper

New instrumentation for the 1.2m Southern Millimeter Wave Telescope (SMWT)

P. Vasquez, P. Astudillo, R. Rodriguez, D. Monasterio, N. Reyes, R. Finger, F. Mena, L. Bronfman

Proceedings Volume 9914, 991428 (2016) https://doi.org/10.1117/12.2233184

KEYWORDS: Telescopes, Receivers, Amplifiers, Extremely high frequency, Calibration, Spectroscopy, Control systems, Microcontrollers, Servomechanisms, Analog electronics

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Proceedings Article | 19 July 2016 Paper

FPGA-based digital signal processing for the next generation radio astronomy instruments: ultra-pure sideband separation and polarization detection

Andrés Alvear, Ricardo Finger, Roberto Fuentes, Raúl Sapunar, Tom Geelen, Franco Curotto, Rafael Rodríguez, David Monasterio, Nicolás Reyes, Patricio Mena, Leonardo Bronfman

Proceedings Volume 9914, 99141E (2016) https://doi.org/10.1117/12.2233090

KEYWORDS: Polarization, Field programmable gate arrays, Receivers, Calibration, Analog electronics, Signal processing, Spectroscopy, Digital signal processing, Radio astronomy, Telescopes

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Proceedings Article | 19 July 2016 Paper

Band-1 receiver front-end cartridges for Atacama Large Millimeter/submillimeter Array (ALMA): design and development toward production

Yuh-Jing Hwang, Chau-Ching Chiong, Yau-De Huang, Chi-Den Huang, Ching-Tang Liu, Yue-Fang Kuo, Shou-Hsien Weng, Chin-Ting Ho, Po-Han Chiang, Hsiao-Ling Wu, Chih-Cheng Chang, Shou-Ting Jian, Chien-Feng Lee, Yi-Wei Lee, Marian Pospieszalski, Doug Henke, Ricardo Finger, Valeria Tapia, Alvaro Gonzalez

Proceedings Volume 9914, 99141X (2016) https://doi.org/10.1117/12.2231547

KEYWORDS: Receivers, Prototyping, Amplifiers, Antennas, Waveguides, Optical amplifiers, Optical isolators, Optical filters, Polarization, Optical design

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The ALMA Band-1 receiver front-end prototype cold and warm cartridge assemblies, including the system and key components for ALMA Band-1 receivers have been developed and two sets of prototype cartridge were fully tested. The measured aperture efficiency for the cold receiver is above the 80% specification except for a few frequency points. Based on the cryogenically cooled broadband low-noise amplifiers provided by NRAO, the receiver noise temperature can be as low as 15 – 32K for pol-0 and 17 – 30K for pol-1. Other key testing items are also measured. The receiver beam pattern is measured, the results is well fit to the simulation and design. The pointing error extracted from the measured beam pattern indicates the error is 0.1 degree along azimuth and 0.15 degree along elevation, which is well fit to the specification (smaller than 0.4 degree). The equivalent hot load temperature for 5% gain compression is 492 - 4583K, which well fit to the specification of 5% with 373K input thermal load. The image band suppression is higher than 30 dB typically and the worst case is higher than 20 dB for 34GHz RF signal and 38GHz LO signal, which is all higher than 7 dB required specification. The cross talk between orthogonal polarization is smaller than -85 dB based on present prototype LO. The amplitude stability is below 2.0 x 10-7 , which is fit to the specification of 4.0 x 10-7 for timescales in the range of 0.05 s ≤ T ≤ 100 s. The signal path phase stability measured is smaller than 5 fs, which is smaller than 22 fs for Long term (delay drift) 20 s ≤ T < 300 sec. The IF output phase variation is smaller than 3.5° rms typically, and the specification is less than 4.5° rms. The measured IF output power level is -28 to -30.5 dBm with 300K input load. The measured IF output power flatness is less than 5.6 dB for 2GHz window, and 1.3dB for 31MHz window. The first batch of prototype cartridges will be installed on site for further commissioning on July of 2017.

Proceedings Article | 23 July 2014 Paper

Development of band-1 receiver cartridge for Atacama Large Millimeter/submillimeter Array (ALMA)

Yuh-Jing Hwang, Chau-Ching Chiong, Ted Huang, Yue-Fang Kuo, Chi-Chang Lin, Chin-Ting Ho, Hedy Chuang, Marian Pospieszalski, Doug Henke, Stephane Claude, Nicolas Reyes, Ricardo Finger

Proceedings Volume 9153, 91532H (2014) https://doi.org/10.1117/12.2055978

KEYWORDS: Receivers, Oscillators, Waveguides, Prototyping, Amplifiers, Optical amplifiers, Antennas, Optical isolators, Field effect transistors, Simulation of CCA and DLA aggregates

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Proceedings Article | 23 July 2014 Paper

A digital sideband-separating receiver for the millimeter band

R. Rodríguez, R. Finger, F. Mena, Leonardo Bronfman, Ernest Michael

Proceedings Volume 9153, 91532E (2014) https://doi.org/10.1117/12.2055226

KEYWORDS: Receivers, Spectroscopy, Calibration, Amplifiers, Analog electronics, Field programmable gate arrays, Optical isolators, Astronomy, Double sideband modulation, Single sideband modulation

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Proceedings Article | 24 September 2012 Paper

New capabilities for the Southern 1.2m mm-Wave Telescope

Rafael Rodríguez, Ricardo Finger, Pablo Vásquez, Ricardo Bustos, Nicolás Reyes, Pablo Zorzi, Leonardo Bronfman, F. Patricio Mena

Proceedings Volume 8452, 845231 (2012) https://doi.org/10.1117/12.925381

KEYWORDS: Receivers, Telescopes, Spectroscopy, Field effect transistors, Diodes, Digital signal processing, Astronomy, Signal processing, Computer architecture, Analog electronics

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Proceedings Article | 24 September 2012 Paper

ALMA band 1 development at Universidad de Chile

Nicolas Reyes, Pablo Zorzi, Claudio Jarufe, Francisco Navarrete, Franco Colleoni, Jose Pizarro, Ricardo Finger, Patricio Mena, Leonardo Bronfman

Proceedings Volume 8452, 84522O (2012) https://doi.org/10.1117/12.925354

KEYWORDS: Receivers, Waveguides, Optical isolators, Cryogenics, Astronomy, Antennas, Signal attenuation, Transducers, Polarization, Spectroscopy

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Showing 5 of 11 publications

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