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Author Ekstrom, H.; Karasik, B.; Weikle, R.; Yngvesson, K. S.; Gol’tsman, G.; Kollberg, E.; Gershenzon, E.
Title Mixers using superconducting Nb films in the resistive state Type Conference Article
Year 1993 Publication 23rd European Microwave Conf. Abbreviated Journal (down) 23rd European Microwave Conf.
Volume Issue Pages 787-789
Keywords Nb HEB mixers
Abstract The mixing of 20 GHz radiation in a Nb superconducting film in the resistive state was studied. The experiment gave evidence of electron-heating to be the origin of the non-linear phenomenon. The requirements on the operation mode and on the film parameters in order to obtain small conversion losses or even gain are determined. Our measurements indicate a conversion loss of about 6-8 dB. The hot-electron bolometer is considered to be very promising for use in heterodyne receivers in a wide frequency range from microwaves to terahertz frequencies.
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Call Number Serial 1651
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Author Cherednichenko, S.; Kollberg, E.; Angelov, I.; Drakinskiy, V.; Berg, T.; Merkel, H.
Title Effect of the direct detection effect on the HEB receiver sensitivity calibration Type Conference Article
Year 2005 Publication Proc. 16th Int. Symp. Space Terahertz Technol. Abbreviated Journal (down)
Volume Issue Pages 235-239
Keywords HEB, mixer, direct detection effect
Abstract We analyze the scale of the HEB receiver sensitivity calibration error caused by the so called “direct detection effect”. The effect comes from changing of the HEB parameters when whey face the calibration loads of different temperatures. We found that for HIFI Band 6 mixers (Herschel Space Observatory) the noise temperature error is of the order of 8% for 300K/77K loads (lab receiver) and 2.5% for 100K/10K loads (in HIFI). Using different approach we also predict that with an isolator between the mixer and the low noise amplifiers the error can be much smaller.
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Publisher Place of Publication Göteborg, Sweden Editor
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Notes Approved no
Call Number Serial 360
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Author Belitsky, V. Yu.; Kollberg, E. L.
Title Tuning circuit for NbN SIS mixer Type Conference Article
Year 1996 Publication Proc. 7th Int. Symp. Space Terahertz Technol. Abbreviated Journal (down)
Volume Issue Pages 234
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Publisher Place of Publication Charlottesville, Virginia, USA Editor
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Notes Approved no
Call Number Serial 264
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Author Merkel, H.; Khosropanah, P.; Yagubov, P.; Kollberg, E.
Title A hot spot mixer model for superconducting phonone–cooled HEB far above the quasipartical band gap Type Conference Article
Year 1999 Publication Proc. 10th Int. Symp. Space Terahertz Technol. Abbreviated Journal (down)
Volume Issue Pages 592-606
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Publisher Place of Publication Charlottesville, Virginia Editor
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Notes Approved no
Call Number Serial 292
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Author Kroug, M.; Cherednichenko, S.; Choumas, M.; Merkel, H.; Kollberg, E.; Hübers, H.-W.; Richter, H.; Loudkov, D.; Voronov, B.; Gol'Tsman, G.
Title HEB quasi-optical heterodyne receiver for THz frequencies Type Conference Article
Year 2001 Publication Proc. 12th Int. Symp. Space Terahertz Technol. Abbreviated Journal (down)
Volume Issue Pages 244-252
Keywords HEB mixer, NbN, MgO, conversion gain bandwidth, noise temperature
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Publisher Place of Publication San Diego, CA, USA Editor
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Notes Approved no
Call Number Serial 319
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