Cryogen‐free dissolution dynamic nuclear polarization polarizer operating at 3.35 T, 6.70 T, and 10.1 T

Autor: Oleksandr Rybalko, Jan Henrik Ardenkjær-Larsen, Sean Bowen, Marcus Görge Ullisch, Niels Chr. Nielsen, Jan Raagaard Petersen, Mads Sloth Vinding

Publikováno v: Ardenkjær-Larsen, J H, Bowen, S, Petersen, J R, Rybalko, O, Vinding, M S, Ullisch, M & Nielsen, N C 2019, ' Cryogen-free dissolution dynamic nuclear polarization polarizer operating at 3.35 T, 6.70 T, and 10.1 T ', Magnetic Resonance in Medicine, vol. 81, no. 3, pp. 2184-2194 . https://doi.org/10.1002/mrm.27537

Purpose: A novel dissolution dynamic nuclear polarization (dDNP) polarizer platform is presented. The polarizer meets a number of key requirements for in vitro, pre-clinical and clinical applications. Method: It uses no liquid cryogens, operates in c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f9f005e31e12a06b5fec8b925def1f0
https://doi.org/10.1002/mrm.27537

A microwave window for K band electromagnetic systems

Autor: Oleksandr Rybalko

Publikováno v: Microwave and Optical Technology Letters. 59:834-837

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::08cb9778f19762043ad4048367386eaf
https://doi.org/10.1002/mop.30391

Nonlinear Theory of Multiharmonic Two-Stream Superheterodyne FELs with Helical Electron Beams

Autor: Iurii Volk, Oleksandr Rybalko, A. V. Lysenko

Publikováno v: 2018 International Conference on Information and Telecommunication Technologies and Radio Electronics (UkrMiCo).

We studied the wave dynamics in multiharmonic two-stream superheterodyne free-electron laser (TSFEL) amplifiers of H-ubitron type using multiharmonic input signals. TSFEL models with straight and helical relativistic electron beams were examined. We

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ab10e964e5e9fcfdd04b1dc4f412560a
https://doi.org/10.1109/ukrmico43733.2018.9047549

A comprehensive study of cryogenic cooled millimeter-wave frequency multipliers based on GaAs Schottky-barrier varactors

Autor: Vitaliy Zhurbenko, Oleksandr Rybalko, Jeffrey L. Hesler, Tom K. Johansen, Berhanu Bulcha

Publikováno v: Johansen, T K, Rybalko, O, Zhurbenko, V, Bulcha, B & Hesler, J 2018, ' A comprehensive study of cryogenic cooled millimeter-wave frequency multipliers based on GaAs Schottky-barrier varactors ', International Journal of Microwave and Wireless Technologies, pp. 1-10 . https://doi.org/10.1017/S1759078717001490

The benefit of cryogenic cooling on the performance of millimeter-wave GaAs Schottky-barrier varactor-based frequency multipliers has been studied. For this purpose, a dedicated compact model of a GaAs Schottky-barrier varactor using a triple-anode d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78bd9ec06a83babadc3b6ca7f2473d59
https://orbit.dtu.dk/en/publications/c053a85e-48b5-4d21-9ba2-2823fc0a695c

Low conversion loss 94 GHz and 188 GHz doublers in InP DHBT technology

Autor: Virginie Nodjiadjim, Jean-Yves Dupuy, Agnieszka Konczykowska, Virginio Midili, Oleksandr Rybalko, Tom K. Johansen, Muriel Riet, Vitaliy Zhurbenko, Michele Squartecchia

Publikováno v: Zhurbenko, V, Johansen, T K, Squartecchia, M, Midili, V, Rybalko, O, Riet, M, Dupuy, JY, Nodjiadjim, V & Konczykowska, A 2017, Low conversion loss 94 GHz and 188 GHz doublers in InP DHBT technology . in Proceedings of 2017 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits . IEEE, 2017 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, Graz, Austria, 20/04/2017 . https://doi.org/10.1109/INMMIC.2017.7927292

An Indium Phosphide (InP) Double Heterojunction Bipolar Transistor (DHBT) process has been utilized to design two doublers to cover the 94 GHz and 188 GHz bands. The 94 GHz doubler employs 4-finger DHBTs and provides conversion loss of 2 dB. A maximu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76ff63d6bd29336257772e282255aaae
https://doi.org/10.1109/inmmic.2017.7927292