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Limitations and Implementation Strategies of Interstage Matching in a 6-W, 28-38-GHz GaN Power Amplifier MMIC

Neininger, Philipp; John, Laurenz; Thome, Fabian; Friesicke, Christian; Bruckner, Peter; Quay, Rüdige; Zwick, Thomas

In this article, we summarize the theoretical matching boundaries and show the limitations they implicate for real-world amplifier design. Starting with a common schematic prototype, we investigate the question of how to realize its electrical response in a densely routed, massively parallelized layout. To that end, we develop a comprehensive study on the application of space-mapping techniques toward the design of high-power amplifiers (HPAs). We derive three reference design procedures and compare their performance in terms of convergence, speed, and practicality when laying out a densely routed HPA interstage matching network. Subsequently, we demonstrate the usefulness of the study by designing the networks of a compact three-stage eight-way wideband HPA in the Ka-band. The processed monolithic microwave integrated circuit features a 1-dB large-signal bandwidth of more than 11 GHz (a fractional bandwidth of 32.8%) and thus covers most of the Ka-band with an output power exceeding 6 W in 3 dB of gain compression. This demonstrates the highest combination of power and bandwidth to date using a reactively matched topology in the Ka-band.

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Verlagsausgabe §
DOI: 10.5445/IR/1000131173
Veröffentlicht am 12.04.2021
DOI: 10.1109/TMTT.2021.3065108
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Hochfrequenztechnik und Elektronik (IHE)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0018-9480, 1557-9670
KITopen-ID: 1000131173
Erschienen in IEEE Transactions on Microwave Theory and Techniques
Verlag Institute of Electrical and Electronics Engineers (IEEE)
Nachgewiesen in Scopus
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