Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Oliver Braz"'
Autor:
Oliver Braz, Holger Gabler, Christian Schieblich, U. Kruger, Kirsten Kruger, Thomas Wirth, Thomas Haustein, Andreas Forck
Publikováno v:
RWS
The Massive MIMO principle is becoming a standard component of 5G cellular communications. 5G New Radio (NR) supports beamforming, beam-adjustment and beam-sweeping techniques. This increases data rates and adds flexibility for resource allocation, e
Publikováno v:
ACSSC
The Massive MIMO principle is becoming a standard component of the next generation wireless communication systems such as 5G. Beamforming and beam-sweeping algorithms have to be inherently supported. In this paper, we give details on a Massive MIMO S
Autor:
Bernhard Piosczyk, G. Michel, Edith Borie, Manfred Thumm, Andreas Arnold, Oliver Braz, K. Koppenburg, M. Kuntze, Olgierd Dumbrajs, G. Dammertz
Publikováno v:
Fusion Engineering and Design. 53:407-421
Successful gyrotron experiments at FZK employing a conventional hollow cylindrical waveguide cavity, a quasi-optical mode converter with dimple-type launcher, a broadband silicon nitride Brewster window and a single-stage depressed collector (SDC), g
Autor:
Bernhard Piosczyk, Stefan Illy, M. Kuntze, Oliver Braz, C.T. Iatrou, G. Michel, G. Dammertz, Manfred Thumm
Publikováno v:
IEEE Transactions on Plasma Science. 27:484-489
A further step in the development of a coaxial-cavity gyrotron operated in the transverse electric TE/sub -31,17/ mode at 165 GHz is presented. The gyrotron has been equipped with a quasi-optical output system consisting of a Vlasov launcher with a s
Autor:
M. Kuntze, K. Koppenburg, Oliver Braz, A. K. Chopra, Bernhard Piosczyk, Manfred Thumm, Günter Dammertz
Publikováno v:
IEEE Transactions on Plasma Science. 27:330-339
The TE/sub 22,6/-mode gyrotron operated at Forschungszentrum Karlsruhe at a frequency of 140 GHz has been investigated with respect to the behavior of different emitter materials, step tunability and reflections of the output beam. Two different mate
Publikováno v:
Frequenz. 62:278-280
Autor:
Oliver Braz, A. Mobius, M. Kuntze, V. E. Zapevalov, C.T. Iatrou, Bernhard Piosczyk, Stefan Illy, A.B. Pavelyev, Manfred Thumm, V.A. Flyagin, V.I. Khishnyak, G. Dammertz, G. Michel
Publikováno v:
IEEE Transactions on Plasma Science. 26:393-401
A 140-GHz, 1.5-MW, TE/sub 28,16/-coaxial cavity gyrotron with a dual RF beam output has been designed, built, and tested. For the first time, the generated RF power has been split into two parts and coupled out through two RF output windows in order
Publikováno v:
International Journal of Infrared and Millimeter Waves. 18:1465-1477
In order to demonstrate the usability of gyrotron oscillators as frequency step tunable high power millimeter-wave sources, experiments on a 1 MW, 140 GHz TE22,6 gyrotron with a built-in quasi-optical (q. o.) mode converter have been performed. By va
Autor:
G. Dammertz, Bernhard Piosczyk, Oliver Braz, V.I. Khishnyak, V. E. Zapevalov, A.B. Pavelyev, V.A. Flyagin, Manfred Thumm, C.T. Iatrou, M. Kuntze, V.I. Malygin, A. Mobius, Stefan Kern
Publikováno v:
IEEE Transactions on Plasma Science. 25:460-469
The design of a 1.5-MW, 140-GHz, TE-/sub 28,16/-coaxial cavity gyrotron is presented and results of experimental operation are given. A cavity with a cylindrical outer wall and a radially tapered inner rod with longitudinal corrugations was used. A m
Design and experimental operation of a 165-GHz, 1.5-MW, coaxial-cavity gyrotron with axial RF output
Autor:
G. Dammertz, Bernhard Piosczyk, M. Kuntze, Oliver Braz, Manfred Thumm, C.T. Iatrou, Stefan Kern
Publikováno v:
IEEE Transactions on Plasma Science. 25:470-479
The development of a coaxial-cavity gyrotron operating in TE/sub 31,17/ mode at 165 GHz is presented. The selection of the operating frequency and mode are based on the limitations imposed by the maximum held of the superconducting (sc) magnet at For