Efficiency Degradation Analysis in Wideband Power Amplifiers
| Autor: | Luis C. Nunes, Pedro M. Cabral, Jose C. Pedro, Diogo R. Barros |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Radiation
Computer science Amplifier 020208 electrical & electronic engineering 020206 networking & telecommunications 02 engineering and technology Condensed Matter Physics Power (physics) Narrowband Electricity generation 0202 electrical engineering electronic engineering information engineering Baseband Harmonic Electronic engineering Electrical and Electronic Engineering Wideband Degradation (telecommunications) |
| Zdroj: | IEEE Transactions on Microwave Theory and Techniques. 66:5640-5651 |
| ISSN: | 1557-9670 0018-9480 |
| Popis: | This paper addresses the mechanisms of wideband power amplifiers’ efficiency degradation in comparison with their narrowband operation. It starts by identifying some possible causes for this performance degradation, showing that the baseband terminations are dominant. A detailed explanation for the efficiency degradation is then presented, considering the scenarios where the most important baseband components fall before or after the resonance imposed by the bias and matching networks. A theoretical model that is able to describe this performance degradation is also presented. Finally, the proposed theory is validated through two implemented power amplifiers with the same fundamental and harmonic terminations, but with different baseband networks, showing that an optimized bias network design can improve the efficiency performance of a PA. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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