Zobrazeno 1 - 10
of 67
pro vyhledávání: '"E. L. Kollberg"'
Autor:
D.C. Streit, Anders Mellberg, E. L. Kollberg, S. Bui, Jörgen Stenarson, Richard Lai, Herbert Zirath, Niklas Rorsman, E. Choumas, Niklas Wadefalk, Iltcho Angelov, Michael E. Barsky, Piotr Starski, R.W. Grundbacher
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 51:1705-1711
This paper describes cryogenic broad-band amplifiers with very low power consumption and very low noise for the 4-8-GHz frequency range. At room temperature, the two-stage InP-based amplifier has a gain of 27 dB and a noise temperature of 31 K with a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::215539c5244abe326c90684c6bbb6051
https://doi.org/10.1109/tmtt.2003.812570
https://doi.org/10.1109/tmtt.2003.812570
Autor:
Heiko Richter, Matthias Kroug, P. Khosropanah, Harald Franz Arno Merkel, Aurèle J. L. Adam, H.-W. Huebers, D. Loudkov, G.N. Gol'tsman, Boris M. Voronov, Serguei Cherednichenko, E. L. Kollberg
Publikováno v:
Physica C: Superconductivity. :427-431
A low noise heterodyne receiver is being developed for the terahertz range using a phonon-cooled hot-electron bolometric mixer based on 3.5 nm thick superconducting NbN film. In the 1–2 GHz intermediate frequency band the double-sideband receiver n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05d1141e4514d48353ab47ff29d84f51
https://doi.org/10.1016/s0921-4534(02)00715-3
https://doi.org/10.1016/s0921-4534(02)00715-3
Autor:
Harald Franz Arno Merkel, E. L. Kollberg, Matthias Kroug, Serguei Cherednichenko, P. Khosropanah
Publikováno v:
Physica C: Superconductivity. :407-415
Hot-electron bolometer frequency down-converters (mixers) based on superconducting films have been found to offer record sensitivity for THz receivers to be used in radio astronomy. In this paper we focus on mixers using NbN phonon-cooled devices. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55731b452560a9dbb29b5238e1fb0948
https://doi.org/10.1016/s0921-4534(02)00711-6
https://doi.org/10.1016/s0921-4534(02)00711-6
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 50:1480-1486
The performance of broad-band low-noise low-dc-power-consumption cryogenic amplifiers have been studied in detail with emphasis on minimizing the power consumption and optimizing the amplifier performance at cryogenic temperature. A general approach
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7bdd3dc13d19e2dc3fd97c0f2e5e2eca
https://doi.org/10.1109/tmtt.2002.1006408
https://doi.org/10.1109/tmtt.2002.1006408
Autor:
E. L. Kollberg, André Vander Vorst, T. Berceli, Peter Russer, Nikolaos K. Uzunoglu, G. Gerosa, Jozef Modelski, Jørgen Bach Andersen, Irina Vendik, Giuseppe Pelosi, Leo P. Ligthart, Antti V. Räisänen, A. Madjar, J. Costa Freire, G. Salmer, Roberto Sorrentino, M. Salazar-Palma, T. Oxley, O.G. Vendik
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 50:1056-1072
An overview of microwave activities and infrastructures in Europe is presented. The material is organized in 17 sections, each devoted to a country or group of countries and prepared by an. internationally renowned microwave expert. In general, each
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25b0430cfd32dae2d0ef44df4e85eb35
https://doi.org/10.1109/22.989994
https://doi.org/10.1109/22.989994
Autor:
Shigehito Miki, Y. Uzawa, Akira Kawakami, E. L. Kollberg, Zhen Wang, Pavel A. Yagoubov, Matthias Kroug
Publikováno v:
Superconductor Science and Technology. 15:141-145
The performance of a hot-electron bolometric (HEB) mixer based on NbN from 0.9 to 2.5 THz was investigated using a quasi-optical receiver configuration. An HEB mixer is an ultra-thin superconducting NbN strip located at the feed point of a thick norm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebcb6a41f3f53b5022ae2f528ce43f89
https://doi.org/10.1088/0953-2048/15/1/325
https://doi.org/10.1088/0953-2048/15/1/325
Autor:
Matthias Kroug, H.-W. Huebers, Boris M. Voronov, G.N. Gol'tsman, E. L. Kollberg, Harald Franz Arno Merkel, H. Richter, Serguei Cherednichenko
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 11:962-965
Sensitivity and gain bandwidth measurements of phonon-cooled NbN superconducting hot-electron bolometer mixers are presented. The best receiver noise temperatures are: 700 K at 1.6 THz and 1100 K at 2.5 THz. Parylene as an antireflection coating on s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f51fb5c2ab685b9b964996265e598b0
https://doi.org/10.1109/77.919508
https://doi.org/10.1109/77.919508
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 48:802-808
A unified way to characterize a two-state one-port switchable network is discussed in this paper. A figure-of-merit of the two-state one-port, called the commutation quality factor (CQF), is introduced. It can be applied to different types of switchi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be096f60f47aca0cec0388e39cdddbee
https://doi.org/10.1109/22.841874
https://doi.org/10.1109/22.841874
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 48:690-699
In this paper, a one-dimensional heat balance model for the hot-spot length of phonon-cooled hot-electron bolometer is set up and solved for the electron temperature profile along the bolometer bridge. A self-consistent theoretical method is presente
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::898a7da56569922e5f92fc7098ec1bde
https://doi.org/10.1109/22.841961
https://doi.org/10.1109/22.841961
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:4201-4204
Based on a one dimensional heat transport equation for the electrons in a super-conducting hot electron bolometer (HEB) a model for a hot spot mixer is see up. The hot spot parameters are applied in a small signal oscillator model predicting IV curve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73fcd63719b19064668f83bc8eef8072
https://doi.org/10.1109/77.783951
https://doi.org/10.1109/77.783951