Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Doug Henke"'
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. :1-16
Autor:
Yau De Huang, Yuh-Jing Hwang, Chau-Ching Chiong, Hsi-Wei Yen, Patrick M. Koch, Chi-Den Huang, Bill Liu, Cheng Lin Chen, Jwu Jiunn Tsai, Wei-Ling Hsiung, Li-Pin Chi, Chin-Ting Ho, Chao-Chin Wang, Chen Chien, You-Hua Chu, Paul Ho, Francisca Kemper, Alvaro Gonzalez, Satoru Iguchi, Yoshi Uzawa, Daisuke Iono, Hiroshi Nagai, John Effland, Kamaljeet Saini, Marian Pospieszalski, Doug Henke, Keith K. Yeung, Ricardo Finger, Valeria Tapia, Nicolas Reyes, Giorgio Siringo, Gianni Marconi, Rodrigo Cabezas
Publikováno v:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI.
Publikováno v:
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS).
We present an improved axial ring feed horn using a logarithmic spiral flare opening and tapered groove geometry that is suitable for wide-angle feeding, as required for offset Gregorian telescopes. To enable a design with maximum aperture efficiency
Publikováno v:
2021 IEEE 19th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM).
A compact front-end design, including an axial-ring corrugated feed horn and a vacuum window, has been designed for a proposed ngVLA Band-5/ Q-band receiver. The electromagnetic performance, optical propagation, and mechanical analysis of the propose
Autor:
Michael D. Niemack, Michel Fich, Thomas Nikola, L. B. G. Knee, Scott Chapman, D. Johnstone, Gordon J. Stacey, Eve M. Vavagiakis, Colin Ross, Doug Henke, Stephen C. Parshley, Steve K. Choi
Publikováno v:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X.
*Doug.Henke@nrc-cnrc.gc.ca Optical design study for an 850 GHz commissioning camera module for CCAT-prime Doug Henke*a, Doug Johnstonea,b, Lewis B.G. Kneea, Scott Chapmanc, Colin Rossc, Michel Fichd, Thomas Nikolae, Steve K. Choif, Michael D. Niemack
Publikováno v:
IEEE Transactions on Terahertz Science and Technology. 6:601-610
To increase the mapping speed of a given area-of-sky, multibeam heterodyne arrays may be used. Since typical heterodyne arrays are spatially arranged sparsely at approximately 4· Nyquist sampling (i.e., two full-width-half-maximum beam widths), many
Publikováno v:
2018 18th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM).
We present measured reflectivity of mirrors made of carbon fibre composite materials across Q-Band (33–50 GHz) and W-Band (75–115 GHz). High reflectivity is demonstrated and indicates that these composite reflectors are suitable for lownoise radi
Publikováno v:
2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS).
The ALMA telescope has now entered cycle 4 operations [1] and as part of a research study proposal [2], we are exploring possible improvements to the ALMA Band 3 receiver cartridge. The Band 3 receiver is capable of detecting both linear polarisation
Autor:
Doug Henke
Publikováno v:
2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz).
A turnstile exhibits excellent performance for linear polarization discrimination and inherently splits each polarization into two even parts. Instead of recombining these parts, as is done with an orthomode transducer, we use each output to feed a s
Autor:
Shou Ting Jian, V. Tapia, Shin'ichiro Asayama, Chin Ting Ho, Chien Feng Lee, John Effland, Ching Tang Liu, Doug Henke, Marian Pospieszalski, Oscar Morata, Alvaro Gonzalez, Shou Hsien Weng, Keith Yeung, Nicolas Reyes, Chih Cheng Chang, Paul T. P. Ho, Yuh-Jing Hwang, Ciska Kemper, Patrick M. Koch, Chi Den Huang, Po Han Chiang, Fang Chia Hsieh, Chau-Ching Chiong, Daisuke Iono, Yau De Huang, Hsiao-Ling Wu, Yi Wei Lee, You-Hua Chu, Kamaljeet Saini, Satoru Iguchi, Yen Hsiang Tseng, Ricardo Finger
Publikováno v:
SPIE Proceedings.
The Atacama Large Millimeter/submillimeter Array(ALMA) Band 1 receiver covers the 35-50 GHz frequency band. Development of prototype receivers, including the key components and subsystems has been completed and two sets of prototype receivers were fu