Improvement to Load-pull Technique for Design of Large-signal Amplifier in K band
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An improvement to the load-pull technique for a large-signal design of a transistor amplifier is proposed. On the contrary to the current load-pull technique – a small-signal pre-matching on the output of the transistor is applied which results in reduced demands on a maximum VSWR of the tuner. This minimizes the launcher radiation in the K band and reduce measurement uncertainty. The proposed method has been verified on a design of 22 GHz large-signal amplifier using a Excelics EPA018A-70 transistor.
KeywordsK frequency band, large-signal measurement, load-pull, microstrip launcher radiation, large-signal amplifier, small-signal pre-matching
Document typePeer reviewed
Document versionFinal PDF
SourceRadioengineering. 2011, vol. 20, č. 4, s. 828-831. ISSN 1210-2512
- 2011/4