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Cherednichenko, Sergey; Drakinskiy, Vladimir; Berg, Therese; Kollberg, Erik L.; Angelov, Iltcho |
![goto web page (via DOI) doi](img/doi.gif)
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The direct detection effect in the hot-electron bolometer mixer sensitivity calibration |
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Journal Article |
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2007 |
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IEEE Trans. Microw. Theory Techn. |
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55 |
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3 |
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504-510 |
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HEB, mixer, direct detection effect |
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0018-9480 |
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RPLAB @ lobanovyury @ |
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555 |
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Meledin, Denis; Pavolotsky, Alexey; Desmaris, Vincent.; Lapkin, Igor; Risacher, Christophe; Perez, Victor; Henke, Douglas; Nystrom, Olle; Sundin, Erik; Dochev, Dimitar; Pantaleev, Miroslav; Fredrixon, Mathias; Strandberg, Magnus; Voronov, Boris; Goltsman, Gregory; Belitsky, Victor |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
A 1.3-THz balanced waveguide HEB mixer for the APEX telescope |
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Journal Article |
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2009 |
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IEEE Trans. Microw. Theory Techn. |
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57 |
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1 |
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89-98 |
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HEB, mixer, waveguide, balanced, NbN |
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In this paper, we report about the development, fabrication, and characterization of a balanced waveguide hot electron bolometer (HEB) receiver for the Atacama Pathfinder EXperiment telescope covering the frequency band of 1.25–1.39 THz. The receiver uses a quadrature balanced scheme and two HEB mixers, fabricated from 4- to 5-nm-thick NbN film deposited on crystalline quartz substrate with an MgO buffer layer in between. We employed a novel micromachining method to produce all-metal waveguide parts at submicrometer accuracy (the main-mode waveguide dimensions are 90×180 μm). We present details on the mixer design and measurement results, including receiver noise performance, stability and “first-light†at the telescope site. The receiver yields a double-sideband noise temperature averaged over the RF band below 1200 K, and outstanding stability with a spectroscopic Allan time more than 200 s. |
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RPLAB @ lobanovyury @ |
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554 |
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Kawamura, J.; Blundell, R.; Tong, C.-Y. E.; Papa, D. C.; Hunter, T. R.; Paine, S. N.; Patt, F.; Gol'tsman, G.; Cherednichenko, S.; Voronov, B.; Gershenzon, E. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Superconductive hot-electron-bolometer mixer receiver for 800-GHz operation |
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Journal Article |
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2000 |
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IEEE Trans. Microw. Theory Techn. |
Abbreviated Journal |
IEEE Trans. Microw. Theory Techn. |
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48 |
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4 |
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683-689 |
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NbN HEB mixers, LO power, local oscillator power, saturation, linearity, dynamic range |
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In this paper, we describe a superconductive hot-electron-bolometer mixer receiver designed to operate in the partially transmissive 350-μm atmospheric window. The receiver employs an NbN thin-film microbridge as the mixer element, in which the main cooling mechanism of the hot electrons is through electron-phonon interaction. At a local-oscillator frequency of 808 GHz, the measured double-sideband receiver noise temperature is TRX=970 K, across a 1-GHz intermediate-frequency bandwidth centered at 1.8 GHz. We have measured the linearity of the receiver and the amount of local-oscillator power incident on the mixer for optimal operation, which is PLO≈1 μW. This receiver was used in making observations as a facility instrument at the Heinrich Hertz Telescope, Mt. Graham, AZ, during the 1998-1999 winter observing season. |
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RPLAB @ lobanovyury @ |
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573 |
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Peter H. Siegel |
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Terahertz technology |
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Journal Article |
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2002 |
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IEEE Trans. Microw. Theory Techn. |
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50 |
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3 |
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910-928 |
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THz applications |
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494 |
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