| Records |
| Author |
Gao, J. R.; Hajenius, M.; Baselmans, J. J. A.; Yang, Z. Q.; Baryshev, A. M.; Barends, R.; Klapwijk, T. M.; Voronov, B.; Gol'tsman, G.; Callaos, N. |
| Title |
Twin-slot antenna coupled NbN hot electron bolometer mixers for space applications |
Type |
Conference Article |
| Year |
2005 |
Publication |
Proc. 9-th WMSCI |
Abbreviated Journal |
Proc. 9-th WMSCI |
| Volume |
9 |
Issue |
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Pages |
148-153 |
| Keywords |
NbN HEB mixers |
Abstract  |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
International Institute of Informatics and Systemics |
Place of Publication |
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ISBN |
9806560639, 9789806560635 |
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Conference |
9th World Multi-Conference on Systemics, Cybernetics and Informatics |
| Notes |
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Approved |
no |
| Call Number |
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Serial |
1480 |
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| Author |
Gao, J. R.; Hajenius, M.; Baselmans, J. J. A.; Klapwijk, T. M.; de Korte, P. A. J.; Voronov, B.; Gol'tsman, G. |
| Title |
NbN hot electron bolometer mixers with superior performance for space applications |
Type |
Conference Article |
| Year |
2004 |
Publication |
Proc. Int. workshop on low temp. electronics |
Abbreviated Journal |
Proc. Int. workshop on low temp. electronics |
| Volume |
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Issue |
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Pages |
11-17 |
| Keywords |
NbN HEB mixers, applications |
| Abstract |
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Thesis |
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Place of Publication |
Noordwijk |
Editor |
Armandillo, E.; Leone, B. |
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Conference |
International workshop on low temperature electronics- WOLTE 6 - Noordwijk |
| Notes |
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Approved |
no |
| Call Number |
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Serial |
1496 |
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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 |
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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Edition |
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| ISSN |
1051-8223 |
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| Notes |
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Approved |
no |
| Call Number |
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Serial |
980 |
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| Author |
Klapwijk, T. M.; Barends, R.; Gao, J. R.; Hajenius, M.; Baselmans, J. J. A. |
| Title |
Improved superconducting hot-electron bolometer devices for the THz range |
Type |
Conference Article |
| Year |
2004 |
Publication |
Proc. SPIE |
Abbreviated Journal |
Proc. SPIE |
| Volume |
5498 |
Issue |
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Pages |
129-139 |
| Keywords |
HEB mixer distributed model, numerical model |
| Abstract |
Improved and reproducible heterodyne mixing (noise temperatures of 950 K at 2.5 THz) has been realized with NbN based hot-electron superconducting devices with low contact resistances. A distributed temperature numerical model of the NbN bridge, based on a local electron and a phonon temperature, has been used to understand the physical conditions during the mixing process. We find that the mixing is predominantly due to the exponential rise of the local resistivity as a function of electron temperature. |
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| Notes |
Invited talk, Recommended by Klapwijk |
Approved |
no |
| Call Number |
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Serial |
912 |
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| Author |
Kooi, J. W.; Baselmans, J. J. A.; Baryshev, A.; Schieder, R.; Hajenius, M.; Gao, J.R.; Klapwijk, T. M.; Voronov, B.; Gol’tsman, G. |
| Title |
Stability of heterodyne terahertz receivers |
Type |
Journal Article |
| Year |
2006 |
Publication |
J. Appl. Phys. |
Abbreviated Journal |
J. Appl. Phys. |
| Volume |
100 |
Issue |
6 |
Pages |
064904 (1 to 9) |
| Keywords |
NbN HEB mixers |
| Abstract |
In this paper we discuss the stability of heterodyne terahertz receivers based on small volume NbN phonon cooled hot electron bolometers (HEBs). The stability of these receivers can be broken down in two parts: the intrinsic stability of the HEB mixer and the stability of the local oscillator (LO) signal injection scheme. Measurements show that the HEB mixer stability is limited by gain fluctuations with a 1∕f spectral distribution. In a 60MHz noise bandwidth this results in an Allan variance stability time of ∼0.3s. Measurement of the spectroscopic Allan variance between two intermediate frequency (IF) channels results in a much longer Allan variance stability time, i.e., 3s between a 2.5 and a 4.7GHz channel, and even longer for more closely spaced channels. This implies that the HEB mixer 1∕f noise is strongly correlated across the IF band and that the correlation gets stronger the closer the IF channels are spaced. In the second part of the paper we discuss atmospheric and mechanical system stability requirements on the LO-mixer cavity path length. We calculate the mixer output noise fluctuations as a result of small perturbations of the LO-mixer standing wave, and find very stringent mechanical and atmospheric tolerance requirements for receivers operating at terahertz frequencies. |
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| ISSN |
0021-8979 |
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Approved |
no |
| Call Number |
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Serial |
1444 |
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