Results 21 to 30 of about 251,929 (295)
Introduction to Millimeter/Sub-millimeter Astronomy [PDF]
, 2018 This is an introduction to the basic elements needed for the measurements and interpretation of data in the millimeter and sub-mm wavelength range. A more complete version will be published in the proceedings of the Saas Fee Winter School 2008.
openaire +2 more sources
Open skies: the National Radio Astronomy Observatory and its impact on US radio astronomy [PDF]
, 2020 This open access book on the history of the National Radio Astronomy Observatory covers the scientific discoveries and technical innovations of late 20th century radio astronomy with particular attention to the people and institutions involved.
Kellermann, Kenneth I. +5 more
core +1 more source
Development of Wideband Tunable E-Band (60-70 GHz) Gunn Oscillator [PDF]
Journal of Astronomy and Space Sciences, 2000 A Gunn waveguide-oscillator, mechanically tunable from 60 to 70 GHz, has been developed for use as a local oscillator (LO) in millimeter radio telescope.
Hyunjoo Kim +3 more
doaj
A NEXT GENERATION MULTI-BEAM FOCAL PLANE ARRAY RECEIVER OF TRAO FOR 86-115 GHZ BAND [PDF]
Journal of Astronomy and Space Sciences, 2006 The noise temperature of existing millimeter-wave receivers is already within two or three times quantum noise limit. One of practical ways to increase the observation speed of single dish radio telescope without longer integration time is use of multi ...
Moon-Hee Chung +5 more
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Compact radiative control structures for millimeter astronomy [PDF]
SPIE Proceedings, 2010 We have designed, fabricated, and tested compact radiative control structures, including antireflection coatings and resonant absorbers, for millimeter through submillimeter wave astronomy. The antireflection coatings consist of micromachined single crystal silicon dielectric sub-wavelength honeycombs.
Ari D. Brown +5 more
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, 1999 This chapter provides a general review of bolometer theory and instrumentation techniques for millimeter-wave bolometric receivers. Formulae for bolometer optimization and sensitivity are derived.
Philip Mauskopf, Mauskopf, Philip Daniel
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Electromagnetic reprogrammable coding-metasurface holograms
Nature Communications, 2017 Realizing metasurfaces with reconfigurability, high efficiency, and control over phase and amplitude is a challenge. Here, Li et al. introduce a reprogrammable hologram based on a 1-bit coding metasurface, where the state of each unit cell of the coding ...
Lianlin Li +9 more
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Radio Physics and Radio Astronomy, 2016 Purpose: developing the sensor for non-contact measurement and profiling parabolic surfaces of antenna systems in the millimeter and submillimeter range with an aperture diameter up to 2 m.
D. L. Chechetkin +4 more
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, 2005 This book is a personal account of the evolution of millimeter-wave astronomy at the National Radio Astronomy Observatory. It begins with the construction of the hugely successful, but flawed, 36 ft radio telescope on Kitt Peak, Arizona, and continues ...
Gordon, M A
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Advanced Functional Materials, EarlyView.The liposome nanoreactor method enables uniform metal nanoparticle synthesis using the interior as a reaction environment. We demonstrate that peptide sequences and lipid compositions act as a functional molecular switch to control reaction environments in liposome nanoreactors.
Yuya Abe +6 more
wiley +1 more source