Performance of a Marchand balun at Q band in Silicon Germanium (SiGe) technology

Conference: GeMiC 2014 - German Microwave Conference
03/10/2014 - 03/12/2014 at Aachen, Germany

Proceedings: ITG-Fb. 246: GeMiC 2014

Pages: 4Language: englishTyp: PDF

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Boglione, Luciano; Goodman, Joel (Naval Research Laboratory, Washington, DC 20375, USA)

The paper reports on the design and characterization at Q band of a compact, integrated Marchand balun with state-of-the-art performance. The balun’s goal is to bring a differential signal delivered by a medium power amplifier (PA) stage to a single-ended output pad. The balun must allow a DC source to bias the PA stage. The practical design constraints on the balun are discussed and a simple, yet effective, design methodology is suggested. The balun has been EM-simulated as a 4-port network to account for the DC input before fabricating it in IBM’s SiGe 8HP process. Experimental results confirm the design approach.