Behavioral modeling of GaN-based power amplifiers: Impact of electrothermal feedback on the model accuracy and identification
✍ Scribed by Roberto Quaglia; Vittorio Camarchia; Federica Cappelluti; Simona Donati Guerrieri; Eduardo G. Lima; Giovanni Ghione; Marco Pirola
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 219 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
In this article, we discuss the accuracy of behavioral models in simulating the intermodulation distortion (IMD) of microwave GaN‐based high‐power amplifiers in the presence of strong electrothermal (ET) feedback. Exploiting an accurate self‐consistent ET model derived from measurements and thermal finite‐element method simulations, we show that behavioral models are able to yield accurate results, provided that the model identification is carried out with signals with wide bandwidth and large dynamics. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2789–2792, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24732