{"title":"A Sub-6 GHz Compact GaN MMIC Doherty PA with a 49.5% 6 dB back-off PAE for 5G Communications","authors":"Sih-Han Li, S. Hsu, Jie Zhang, Keh-Ching Huang","doi":"10.1109/MWSYM.2018.8439474","DOIUrl":null,"url":null,"abstract":"This paper presents a sub-6 GHz MMIC Doherty power amplifier (DPA) for 5G communication applications based on a $\\pmb{0.25-\\mu }\\mathbf{mGaN}$ HEMT process. The impedance inverter of the DPA is realized by combining a compact transmission line network with two shunt capacitors. Also, the ratio of power cells in the main and auxiliary amplifiers is optimized to achieve a high efficiency in output power back-off. The measured peak output power and $\\mathbf{P}_{\\pmb{1}\\mathbf{d}\\mathbf{B}}$ are 38.7 and 32.1 dBm, respectively at 5.9 GHz. The power-added-efficiency (PAE) at a 6-dB output power backoff is up to 49.5%.","PeriodicalId":6675,"journal":{"name":"2018 IEEE/MTT-S International Microwave Symposium - IMS","volume":"8 1","pages":"805-807"},"PeriodicalIF":0.0000,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"8","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2018 IEEE/MTT-S International Microwave Symposium - IMS","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MWSYM.2018.8439474","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 8
Abstract
This paper presents a sub-6 GHz MMIC Doherty power amplifier (DPA) for 5G communication applications based on a $\pmb{0.25-\mu }\mathbf{mGaN}$ HEMT process. The impedance inverter of the DPA is realized by combining a compact transmission line network with two shunt capacitors. Also, the ratio of power cells in the main and auxiliary amplifiers is optimized to achieve a high efficiency in output power back-off. The measured peak output power and $\mathbf{P}_{\pmb{1}\mathbf{d}\mathbf{B}}$ are 38.7 and 32.1 dBm, respectively at 5.9 GHz. The power-added-efficiency (PAE) at a 6-dB output power backoff is up to 49.5%.
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