@inproceedings{d08f129234ca47eb807d9853b1286630,
title = "Analysis of tilting load-lines in AlGaN/GaN broadband uniform distributed amplifiers",
abstract = "This paper presents a general analysis of tilting load-lines in uniform distributed power amplifiers (UDPA). By means of an ideal equivalent circuit, the dependency of the load-line behavior of the first transistor on design parameters is examined. A DC-15 GHz UDPA designed in a 0.25 µm AlGaN/GaN technology is employed to verify the undertaken theoretical analysis by large-signal simulation and thermal IR-imaging results. The theoretical analysis shows that the two most effective remedies are transistor tapering and drain-line tapering to maintain the first transistor in the safe operating region. Nevertheless, in the presented AlGaN/GaN UDPA design power absorption by the first transistor at certain frequencies could not be suppressed by drain-line tapering due to design specific constraints.",
keywords = "AlGaN/GaN, Distributed power amplifier, Load-line analysis, MMIC, Traveling-wave-amplifier, TWA, UDPA",
author = "Malte Coers and Wolfgang B{\"o}sch",
year = "2019",
month = jan,
day = "1",
language = "English",
series = "8th German Microwave Conference, GeMiC 2014",
publisher = "VDE-Verlag GmbH, Berlin, Offenbach",
booktitle = "8th German Microwave Conference, GeMiC 2014",
note = "8th German Microwave Conference, GeMiC 2014 ; Conference date: 10-03-2014 Through 12-03-2014",
}