{"title":"通过输入包络注入和“自”包络跟踪提高a /AB类移动终端功率放大器效率","authors":"A. Kheirkhahi, P. Asbeck, L. Larson","doi":"10.1109/MWSYM.2011.5972901","DOIUrl":null,"url":null,"abstract":"A baseband modulation technique is proposed to improve the efficiency and linearity of Class-A/AB radio frequency (RF) power amplifiers (PAs). The baseband load impedance is optimized, and the input envelope — along with the RF signal — is fed to the PA input. The resulting baseband modulation of the drain increases the saturated RF output power and improves the linearity for a given dc power consumption. A 2GHz HFET power amplifier exhibited a significant improvement in peak PAE from 40% to 54% for a two-tone input and from 23% to 27% for a 5MHz BW 64-QAM signal.","PeriodicalId":294862,"journal":{"name":"2011 IEEE MTT-S International Microwave Symposium","volume":"57 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2011-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":"{\"title\":\"Enhanced Class-A/AB mobile terminal power amplifier efficiency by input envelope injection and “self” envelope tracking\",\"authors\":\"A. Kheirkhahi, P. Asbeck, L. Larson\",\"doi\":\"10.1109/MWSYM.2011.5972901\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A baseband modulation technique is proposed to improve the efficiency and linearity of Class-A/AB radio frequency (RF) power amplifiers (PAs). The baseband load impedance is optimized, and the input envelope — along with the RF signal — is fed to the PA input. The resulting baseband modulation of the drain increases the saturated RF output power and improves the linearity for a given dc power consumption. A 2GHz HFET power amplifier exhibited a significant improvement in peak PAE from 40% to 54% for a two-tone input and from 23% to 27% for a 5MHz BW 64-QAM signal.\",\"PeriodicalId\":294862,\"journal\":{\"name\":\"2011 IEEE MTT-S International Microwave Symposium\",\"volume\":\"57 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2011-06-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2011 IEEE MTT-S International Microwave Symposium\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/MWSYM.2011.5972901\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2011 IEEE MTT-S International Microwave Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MWSYM.2011.5972901","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Enhanced Class-A/AB mobile terminal power amplifier efficiency by input envelope injection and “self” envelope tracking
A baseband modulation technique is proposed to improve the efficiency and linearity of Class-A/AB radio frequency (RF) power amplifiers (PAs). The baseband load impedance is optimized, and the input envelope — along with the RF signal — is fed to the PA input. The resulting baseband modulation of the drain increases the saturated RF output power and improves the linearity for a given dc power consumption. A 2GHz HFET power amplifier exhibited a significant improvement in peak PAE from 40% to 54% for a two-tone input and from 23% to 27% for a 5MHz BW 64-QAM signal.
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