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Author Datesman, A.M.; Schultz, J.C.; Lichtenberger, A.W.; Golish, D.; Walker, C.K.; Kooi, J.
Title Fabrication and characterization of niobium diffusion-cooled hot-electron bolometers on silicon nitride membranes Type Journal Article
Year 2005 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal
Volume (down) 15 Issue 2 Pages 928-931
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ISSN 1051-8223 ISBN Medium
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Notes Approved no
Call Number Serial 439
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Author Koshelets, V.P.; Dmitriev, P.N.; Ermakov, A.B.; Sobolev, A.S.; Torgashin, M.Y.; Kurin, V.V.; Pankratov, A.L.; Mygind, J.
Title Optimization of the phase-locked flux-flow oscillator for the submm integrated receiver Type Journal Article
Year 2005 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal
Volume (down) 15 Issue 2 Pages 964-967
Keywords SIR
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ISSN 1051-8223 ISBN Medium
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Notes Approved no
Call Number Serial 515
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Author Koshelets, V. P.; Shitov, S. V.; Ermakov, A. B.; Filippenko, L. V.; Koryukin, O. V.; Khudchenko, A. V.; Torgashin, M. Yu.; Yagoubov, P. A.; Hoogeveen, R. W. M.; Pylypenko, O. M.
Title Superconducting integrated receiver for TELIS Type Journal Article
Year 2005 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal
Volume (down) 15 Issue 2 Pages 960-963
Keywords SIR
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ISSN 1051-8223 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number Serial 517
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Author Baselmans, J. J. A.; Hajenius, M.; Gao, J. R.; Baryshev, A.; Kooi, J.; Klapwijk, T. M.; Voronov, B.; de Korte, P.; Gol'tsman, G.
Title NbN hot electron bolometer mixers: sensitivity, LO power, direct detection and stability Type Journal Article
Year 2005 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal IEEE Trans. Appl. Supercond.
Volume (down) 15 Issue 2 Pages 484-489
Keywords HEB mixers, direct detection effect, stability, Allan variance
Abstract We demonstrate that the performance of NbN lattice cooled hot electron bolometer mixers depends strongly on the interface quality between the bolometer and the contact structure. Both the receiver noise temperature and the gain bandwidth can be improved by a factor of 2 by cleaning the interface and adding an additional superconducting interlayer to the contact pad. Using this we obtain a double sideband receiver noise temperature of 950 K at 2.5 THz and 4.3 K, using a 0.4/spl times/4 /spl mu/m HEB mixer with a spiral antenna. At the same bias point, we obtain an IF gain bandwidth of 6 GHz. To comply with current demands on THz mixers for use in space based receivers we reduce the device size to 0.15/spl times/1 /spl mu/m and use a twin slot antenna. We report measurements of the noise temperature, LO power requirement, stability and the direct detection effect, using a mixer with a 1.6 THz twin slot antenna and a 1.462 THz solid state LO source with calibrated output power.
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ISSN 1051-8223 ISBN Medium
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Notes Approved no
Call Number Serial 546
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Author Hajenius, M.; Barends, R.; Gao, J. R.; Klapwijk, T. M.; Baselmans, J. J. A.; Baryshev, A.; Voronov, B.; Gol'tsman, G.
Title Local resistivity and the current-voltage characteristics of hot electron bolometer mixers Type Journal Article
Year 2005 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal IEEE Trans. Appl. Supercond.
Volume (down) 15 Issue 2 Pages 495-498
Keywords HEB mixer distributed model, HEB distributed model, distributed HEB model
Abstract Hot-electron bolometer devices, used successfully in low noise heterodyne mixing at frequencies up to 2.5 THz, have been analyzed. A distributed temperature numerical model of the NbN bridge, based on a local electron and a phonon temperature, is used to model pumped IV curves and understand the physical conditions during the mixing process. We argue that the mixing is predominantly due to the strongly temperature dependent local resistivity of the NbN. Experimentally we identify the origins of different transition temperatures in a real HEB device, suggesting the importance of the intrinsic resistive transition of the superconducting bridge in the modeling.
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ISSN 1051-8223 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number Serial 980
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