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EnglishThe linearity is a crucial requirement of power amplifiers. At design level, it is typically assessed by means of AM/AM, AM/PM and IMR, which are extracted from 1- and 2-tone characterization. These however are not fully representative of the actual behaviour under modulated signal excitation, for which purpose other system-level metrics such as the NPR have been successfully introduced. In this paper, different linearity estimations are used to compare two GaN-on-Si Doherty MMIC power amplifiers for Ka-band space applications. One of the two amplifiers shows an AM/PM reduction of more than 30% with respect to the other. However, it is observed that this does not always lead to a reduction in NPR. The reasons for this disagreement between metrics are analysed and discussed.
Linearity-aware design of Doherty power amplifiers / Piacibello, Anna; Figueiredo, Ricardo; Camarchia, Vittorio; Pirola, Marco; Carvalho, Nuno Borges. - ELETTRONICO. - (2019), pp. 1-3. ((Intervento presentato al convegno 2019 IEEE MTT-S International Microwave Conference on Hardware and Systems for 5G and Beyond (IMC-5G) tenutosi a Atlanta, USA nel 15-16 Aug. 2019 [10.1109/IMC-5G47857.2019.9160390].
| Titolo: | Linearity-aware design of Doherty power amplifiers | |
| Autori: | ||
| Data di pubblicazione: | 2019 | |
| Abstract: | The linearity is a crucial requirement of power amplifiers. At design level, it is typically asse...ssed by means of AM/AM, AM/PM and IMR, which are extracted from 1- and 2-tone characterization. These however are not fully representative of the actual behaviour under modulated signal excitation, for which purpose other system-level metrics such as the NPR have been successfully introduced. In this paper, different linearity estimations are used to compare two GaN-on-Si Doherty MMIC power amplifiers for Ka-band space applications. One of the two amplifiers shows an AM/PM reduction of more than 30% with respect to the other. However, it is observed that this does not always lead to a reduction in NPR. The reasons for this disagreement between metrics are analysed and discussed. | |
| ISBN: | 978-1-7281-3143-6 | |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
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| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| 09160390.pdf | post-print editoriale | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
| IMC-5G.pdf | post-print autore | 2. Post-print / Author's Accepted Manuscript | PUBBLICO - Tutti i diritti riservati | Visibile a tuttiVisualizza/Apri |
http://hdl.handle.net/11583/2842644
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