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Featured researches published by Lothar Schenk.


IEEE Transactions on Microwave Theory and Techniques | 2017

70W GaN-HEMT Ku -Band Power Amplifier in MIC Technology

Daniel Maassen; Felix Rautschke; Florian Ohnimus; Lothar Schenk; Uwe Dalisda; Georg Boeck

In this paper the design, implementation, and experimental results of a Ku-band 70W GaN-HEMT power amplifier (PA) for satellite communication are presented. A two-stage design approach with two 250nm bare-die devices has been chosen to achieve a considerably high saturated gain of 15 dB over the whole extended Ku-band (13.75–14.5 GHz). The circuit was realized in a hybrid microwave integrated circuit technology on an alumina substrate. The PA shows a measured performance of more than 50W output power for a continuous-wave signal with a power-added efficiency (PAE) higher than 23%. Modulated measurements demonstrate an average output power of more than 30W (70W peak) and 21% PAE, while holding the Eutelsat linearity requirements.


Archive | 2012

QUASI-BROADBAND DOHERTY AMPLIFIER WITH ASSOCIATED CAPACITOR CIRCUIT

Lothar Schenk


Archive | 2012

Hochfrequenzleistungsverstärker mit Doherty-Erweiterung

Lothar Schenk


european microwave conference | 2016

A hybrid 50-W GaN-HEMT Ku-band power amplifier

Felix Rautschke; Daniel Maassen; Florian Ohnimus; Lothar Schenk; Uwe Dalisda; Georg Boeck


Archive | 2013

Quasi-broadband amplifier according to the doherty principle

Sebastian Stempfl; Bernhard Kaehs; Uwe Dalisda; Lothar Schenk


Archive | 2011

HIGH-FREQUENCY POWER AMPLIFIER WITH DOHERTY EXTENSION

Lothar Schenk


Archive | 2011

High-frequency power amplifier having doherty enhancement

Lothar Schenk


Archive | 2017

COMBINER, A POWER DIRECTIONAL COUPLER AND A METHOD FOR MANUFACTURING A POWER DIRECTIONAL COUPLER AND A COMBINER

Marco Witte; Knut Laurisch; Christian Riedel; Rudolf Weinberger; Stefan Fritz; Lothar Schenk


european microwave conference | 2016

An 60 W average power wideband amplifier with envelope tracking for DVB-T applications

Daniel Maassen; Lothar Schenk; Martin Muessener; Peter Muehlbacher; Uwe Dalisda; Georg Boeck


Archive | 2015

CAPACITOR CIRCUIT FOR A QUASI-BROADBAND DOHERTY AMPLIFIER

Lothar Schenk

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