| Records |
| Author |
Cherednichenko, Sergey; Drakinskiy, Vladimir; Berg, Therese; Kollberg, Erik L.; Angelov, Iltcho |
| Title |
The direct detection effect in the hot-electron bolometer mixer sensitivity calibration |
Type |
Journal Article |
| Year |
2007 |
Publication |
IEEE Trans. Microw. Theory Techn. |
Abbreviated Journal |
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| Volume |
55 |
Issue  |
3 |
Pages |
504-510 |
| Keywords |
HEB, mixer, direct detection effect |
| Abstract |
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| ISSN |
0018-9480 |
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no |
| Call Number |
RPLAB @ lobanovyury @ |
Serial |
555 |
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| Author |
Burke, P. J.; Schoelkopf, R. J.; Prober, D. E.; Skalare, A.; Karasik, B. S.; Gaidis, M. C.; McGrath, W. R.; Bumble, B.; LeDuc, H. G. |
| Title |
Mixing and noise in diffusion and phonon cooled superconducting hot-electron bolometers |
Type |
Journal Article |
| Year |
1999 |
Publication |
J. Appl. Phys. |
Abbreviated Journal |
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| Volume |
85 |
Issue |
3 |
Pages |
1644-1653 |
| Keywords |
HEB, mixer |
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Edition |
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| ISSN |
0021-8979 |
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Approved |
no |
| Call Number |
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Serial |
556 |
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| Author |
Tong, C.-Y.E.; Meledin, D.V.; Marrone, D.P.; Paine, S.N.; Gibson, H.; Blundell, R. |
| Title |
Near field vector beam measurements at 1 THz |
Type |
Journal Article |
| Year |
2003 |
Publication |
IEEE Microw. Compon. Lett. |
Abbreviated Journal |
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| Volume |
13 |
Issue |
6 |
Pages |
235-237 |
| Keywords |
HEB, mixer, waveguide, LO power, local oscillator power, saturation effect, dynamic range |
| Abstract |
We have performed near-field vector beam measurements at 1.03 THz to characterize and align the receiver optics of a superconducting receiver. The signal source is a harmonic generator mounted on an X-Y translation stage. We model the measured two-dimensional complex beam pattern by a fundamental Gaussian mode, from which we derive the position of the beam center, the beam radius and the direction of propagation. By performing scans in the planes separated by 400 mm, we have confirmed that our beam pattern measurements are highly reliable. |
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Edition |
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| ISSN |
1531-1309 |
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Approved |
no |
| Call Number |
RPLAB @ lobanovyury @ |
Serial |
574 |
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| Author |
Siddiqi, I.; Prober, D. E. |
| Title |
Nb–Au bilayer hot-electron bolometers for low-noise THz heterodyne detection |
Type |
Journal Article |
| Year |
2004 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
84 |
Issue |
8 |
Pages |
1404 |
| Keywords |
HEB, mixers, dynamic range, saturation, LO power, local oscillator power, Nb |
| Abstract |
The sensitivity of present Nb diffusion-cooled hot-electron bolometer (HEB) mixers is not quantum limited, and can be improved by reducing the superconducting transition temperature TC. Lowering TC reduces thermal fluctuations, resulting in a decrease of the mixer noise temperature TM. However, lower TC mixers have reduced dynamic range and saturate more easily due to background noise. We present 30 GHz microwave measurements on a bilayer HEB system, Nb–Au, in which TC can be tuned with Au layer thickness to obtain the maximum sensitivity for a given noise background. These measurements are intended as a guide for the optimization of THz mixers. Using a Nb–Au mixer with TC = 1.6 K, we obtain TM = 50 K with 2 nW of local oscillator (LO) power. Good mixer performance is observed over a wide range of LO power and bias voltage and such a device should not exhibit saturation in a THz receiver. |
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Edition |
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| ISSN |
0003-6951 |
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Approved |
no |
| Call Number |
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Serial |
571 |
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| Author |
Гольцман, Г.Н.; Лудков, Д.Н. |
| Title |
Сверхпроводниковые смесители на горячих электронах терагерцового диапазона и их применение в радиоастрономии |
Type |
Journal Article |
| Year |
2003 |
Publication |
Изв. высших учебных заведений. Радиофизика |
Abbreviated Journal |
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| Volume |
46 |
Issue |
8/9 |
Pages |
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| Keywords |
HEB, mixers |
| Abstract |
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| Language |
russian |
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| Notes |
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no |
| Call Number |
RPLAB @ s @ |
Serial |
473 |
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