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Author Ryabchun, S.; Tong, C.-yu E.; Blundell, R.; Kimberk, R.; Gol’tsman, G.
Title Effect of microwave radiation on the stability of terahertz hot-electron bolometer mixers Type Conference Article
Year 2006 Publication Proc. SPIE Abbreviated Journal Proc. SPIE
Volume (down) 6373 Issue Pages 63730J (1 to 5)
Keywords NbN HEB mixers, hot-electron bolometer mixers, stability, Allan variance, LO power fluctuations
Abstract We report our studies of the effect of microwave radiation, with a frequency much lower than that corresponding to the energy gap of the superconductor, on the performance of the NbN hot-electron bolometer (HEB) mixer incorporated into a THz heterodyne receiver. It is shown that exposing the HEB mixer to microwave radiation does not result in a significant rise of the receiver noise temperature and degradation of the mixer conversion gain so long as the level of microwave power is small compared to the local oscillator drive. Hence the injection of a small, but controlled amount of microwave radiation enables active compensation of local oscillator power and coupling fluctuations which can significantly degrade the stability of HEB mixer receivers.
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Publisher SPIE Place of Publication Editor Anwar, M.; DeMaria, A.J.; Shur, M.S.
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Area Expedition Conference Terahertz Physics, Devices, and Systems
Notes Approved no
Call Number Serial 1441
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Author David Olaya; Jian Wei; Sergei Pereverzev; Karasik, Boris S.; Kawamura, Jonat.han H.; McGrath, William R.; Sergeyev, Andrei V.; Gershenson, Michael E.
Title An ultrasensitive hot-electron bolometer for low-background SMM applications Type Conference Article
Year 2006 Publication Proc. SPIE Abbreviated Journal
Volume (down) 6275 Issue Pages 627506
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Notes Approved no
Call Number RPLAB @ s @ qoheb_det_SPIE_Olaya_2006 Serial 387
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Author Karpov, A.; Miller, D.; Rice, F.; Stern, J. A.; Bumble, B.; LeDuc, H. G.; Zmuidzinas, J.
Title Development of 1.25 THz SIS mixer for Herschel Space Observatory Type Conference Article
Year 2006 Publication Proc. SPIE Abbreviated Journal
Volume (down) 6275 Issue Pages 62751
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Publisher Place of Publication Editor Zmuidzinas, Jonas; Holland, Wayne S.
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Notes Approved no
Call Number RPLAB @ s @ Karpov_SIS_2006 Serial 401
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Author Cherednichenko, S.; Drakinskiy, V.; Baubert, J.; Lecomte, B.; Dauplay, F.; Krieg, J. M.; Delorme, Y.; Feret, A.; Hübers, H. W.; Semenov, A. D.; Gol'tsman, G. N.
Title 2.5 THz multipixel heterodyne receiver based on NbN HEB mixers Type Conference Article
Year 2006 Publication Proc. SPIE Abbreviated Journal Proc. SPIE
Volume (down) 6275 Issue Pages 62750I (1 to 11)
Keywords HEB, mixer, membrane
Abstract A 16 pixel heterodyne receiver for 2.5 THz has been developed based on NbN superconducting hot-electron bolometer (HEB) mixers. The receiver uses a quasioptical RF coupling approach where HEB mixers are integrated into double dipole antennas on 1.5 µm thick Si3N4/SiO2 membranes. Spherical mirrors (one per pixel) and backshort distance from the antenna have been used to design the output mixer beam profile. The camera design allows all 16 pixel IF readout in parallel. The gain bandwidth of the HEB mixers on Si3N4/SiO2 membranes was found to be 0.7÷0.9 GHz, which is much smaller than for similar devices on silicon. Application of buffer layers and use of alternative types of membranes (e.g. silicon-on-insulator) is under investigation.
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Notes Approved no
Call Number Serial 561
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Author Piotr슠Orleanski; Miroslaw슠Ciechanowicz; Malgorzata슠Michalska; Witold슠Nowosielski; Miroslaw슠Rataj; Marek슠Winkler
Title LCU: the control unit dedicated for local oscillator subsystem in ESA HIFI/Herschel project Type Conference Article
Year 2006 Publication Proc. SPIE Abbreviated Journal
Volume (down) 6159 Issue Pages
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Notes Approved no
Call Number RPLAB @ s @ LO_control_HIFI_Heschel_2006 Serial 391
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