Dr. Yuh-Jing Hwang Profile

Dr. Yuh-Jing Hwang

Associate Research Fellow at Academia Sinica Inst of Astronomy & Astrophysics

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Author

Publications (15)

Proceedings Article | 23 August 2024 Poster + Paper

Poster + Paper

Lessons learned: ALMA band-1 receiver project management

Yu Chieh (Teddy) Huang, Patrick Michel Koch, Yuh-Jing Hwang, Chau-Ching Chiong, Hsi-Wei Yen, Paul Ho, You-Hua Chu, Ue-Li Pen, Chin-Ting Ho, Chen Chien, Chao-Ching Wang

Proceedings Volume 13099, 130991Y (2024) https://doi.org/10.1117/12.3018608

KEYWORDS: Project management, Receivers, Organization management, Quality management, Design, Risk assessment, Radio astronomy, Astrophysics, Astronomy, Telescopes

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Proceedings Article | 16 August 2024 Presentation + Paper

Presentation + Paper

ALMA2030 Band-4+5 receiver front-end wideband sensitivity upgrade: first year initial development and future plan

Yuh-Jing Hwang, Bangwon Lee, MingJye Wang, Yu Chieh Huang, Chau-Ching Chiong, Yue-Fang Kuo, Chen Chien, Chin-Ting Ho, Tse-Jun Chen, Wei-Chun Lu, Yen-Pin Chang, Hsiao-Wen Chang, Chuang-Ping Chiu, Jia-Ruei Nian, Chao-Ching Wang, Fang-Yu Hsu, Pai-An Chen, Lou-Chien Lu, Patrick Koch, Takafumi Kojima, Alvaro Gonzalez

Proceedings Volume 13102, 131020M (2024) https://doi.org/10.1117/12.3017708

KEYWORDS: Receivers, Design, Waveguides, Cryogenics, Mirrors, Antennas, Quantum receivers, Field effect transistors, Transducers, Oscillators

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Proceedings Article | 2 September 2022 Presentation + Paper

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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Proceedings Article | 9 July 2018 Paper

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

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

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 | 19 July 2016 Paper

Paper

Strategies on solar observation of Atacama Large Millimeter/submillimeter Array (ALMA) band-1 receiver

Chau-Ching Chiong, Po-Han Chiang, Yuh-Jing Hwang, Yau-De Huang

Proceedings Volume 9914, 991421 (2016) https://doi.org/10.1117/12.2232254

KEYWORDS: Receivers, Amplifiers, Cryogenics, Signal attenuation, Calibration, Sun, Optical amplifiers, Antennas, Solar processes, Optical isolators

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Proceedings Article | 23 July 2014 Paper

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 | 24 September 2012 Paper

Paper

Development of receiver and local oscillator components for Atacama large millimeter/submillimeter array (ALMA) band-1 in Taiwan

Yuh-Jing Hwang, Chau-Ching Chiong, Yue-Fang Kuo, Chi-Chang Lin, Chin-Ting Ho, Ching-Chi Chuang, Hong-Yeh Chang, Yo-Shen Lin, Zuo-Min Tsai, Huei Wang

Proceedings Volume 8452, 84522Q (2012) https://doi.org/10.1117/12.925875

KEYWORDS: Receivers, Oscillators, Amplifiers, Gallium arsenide, Cryogenics, Transistors, Interference (communication), Bandpass filters, Linear filtering, Sensors

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Proceedings Article | 18 July 2008 Paper

Paper

Cryogenic testing and multi-chip module design of a 31.3-45GHz MHEMT MMIC-based heterodyne receiver for radio astronomy

Yuh-Jing Hwang, Chau-Ching Chiong, Su-Wei Chang, Tashun Wei, Wei-Ting Wong, Yo-Shen Lin, Ming-Tang Chen, Huei Wang, Hong-Yeh Chang

Proceedings Volume 7020, 70201V (2008) https://doi.org/10.1117/12.789127

KEYWORDS: Receivers, Amplifiers, Cryogenics, Waveguides, Heterodyning, Bandpass filters, Diodes, Prototyping, Radio astronomy, Astronomy

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Proceedings Article | 10 July 2008 Paper

Paper

AMiBA first year observation

Kai-yang Lin, Chao-Te Li, Juin-Huei Proty Wu, Patrick Koch, Keiichi Umetsu, Guo-Chin Liu, Hiroaki Nishioka, Pablo Altamirano, Derek Kubo, Chih-Chiang Han, Yao-De Huang, Philippe Raffin, Michael Kesteven, Chih-Wei Huang, Yo-Wei Liao, Fu-Cheng Wang, Su-Wei Chang, Chia-Hao Chang, Peter Oshiro, Shu-Hao Chang, Homin Jiang, Ming-Tang Chen, Yue-Jing Hwang, Warwick Wilson, Ke-Jung Chen, Fabiola Ibanez-Romano, Paul T.-P. Ho, Wei-Yan Pauchy Hwang

Proceedings Volume 7012, 701207 (2008) https://doi.org/10.1117/12.788347

KEYWORDS: Visibility, Receivers, Calibration, Optical correlators, Telescopes, Galaxy groups and clusters, Polarization, Switching, Reflectors, Mirrors

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Proceedings Article | 27 June 2006 Paper

Paper

Initial operation of the array for microwave background anisotropy (AMiBA)

Chao-Te Li, Chih-Chiang Han, Ming-Tang Chen, Yau-De Huang, Homin Jiang, Yuh-Jing Hwang, Su-Wei Chang, Shu-Hao Chang, Pierre Martin-Cocher, Chia-Hao Chang, Chung-Cheng Chen, Warwick Wilson, Keiichi Umetsu, Kai-Yang Lin, Patrick Koch, Guo-Chin Liu, Hiroaki Nishioka, Paul Ho

Proceedings Volume 6275, 62751I (2006) https://doi.org/10.1117/12.672622

KEYWORDS: Receivers, Optical correlators, Amplifiers, Interference (communication), Microwave radiation, Dielectric polarization, Anisotropy, Antennas, Switching, Visibility

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Proceedings Article | 8 October 2004 Paper

Paper

W-band dual-polarization receiver for array of microwave background anisotropy (AMiBA)

Yuh-Jing Hwang, Ming-Tang Chen, Homing Jiang, Tah-Hsiung Chu, Sun-Nieng Hsieh, Chi-Chian Han, Ferdinand Patt, West Ho, Yau-Der Huang, Warwick Wilson

Proceedings Volume 5498, (2004) https://doi.org/10.1117/12.551096

KEYWORDS: Receivers, Prototyping, Polarization, Microwave radiation, Amplifiers, Anisotropy, Cryogenics, Diodes, Waveguides, Transducers

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Proceedings Article | 17 February 2003 Paper

Paper

Full-polarization W-band receiver for CMB detection

Ming-Tang Chen, Yuh-Jing Hwang, West Ho, Homing Jiang, Tah-Hsuing Chu, Li-Sien Wang, Sun-Nieng Hsieh, Johnson Han, Malcolm Sinclair

Proceedings Volume 4855, (2003) https://doi.org/10.1117/12.459425

KEYWORDS: Receivers, Signal detection, Amplifiers, Prototyping, Polarization, Microwave radiation, Sensors, Cryogenics, Computer aided design, Transducers

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Proceedings Article | 3 July 2000 Paper

Paper

Progress report on the Sub-Millimeter Array in Taiwan: the receiver system

Ming-Tang Chen, Shu-Haur Chang, Chi Chin, Tah-Hsuing Chu, Shu-I Hu, Mao-Shu Hwang, Yuh-Jig Hwang, Kwok-Yung Lo, Robert Martin, Pierre Martin-Cocher, Sung-Shiou Shen, Shun-Cheng Yang, Ming-Jye Wang

Proceedings Volume 4015, (2000) https://doi.org/10.1117/12.390417

KEYWORDS: Receivers, Shape memory alloys, Antennas, Astronomy, Observatories, Signal detection, Mirrors, System integration, Electronics, Temperature metrology

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Showing 5 of 15 publications

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