{"title":"采用非线性误差放大器和偏置对准控制的高效率前馈功率放大器","authors":"R. Braithwaite, A. Khanifar","doi":"10.1109/MWSYM.2013.6697336","DOIUrl":null,"url":null,"abstract":"A high efficiency feedforward power amplifier (FFPA) is proposed that uses the Doherty configuration for the both the main amplifier (MA) and error amplifier (EA). Using a nonlinear EA is a deviation from the traditional FFPA. A loop control algorithm is proposed that offsets the alignment setting from the standard value to best utilize the power handling capability and linearity of the MA and EA. A system efficiency of 25% is achieved for a rated output power of 52.7 dBm, while exceeding the WCDMA specifications. Reducing the peak-to-average power ratio (PAPR) of the input signal to 8 dB and using offset control improves the ACLR performance to -62 dBc.","PeriodicalId":128968,"journal":{"name":"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2013-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":"{\"title\":\"High efficiency feedforward power amplifier using a nonlinear error amplifier and offset alignment control\",\"authors\":\"R. Braithwaite, A. Khanifar\",\"doi\":\"10.1109/MWSYM.2013.6697336\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A high efficiency feedforward power amplifier (FFPA) is proposed that uses the Doherty configuration for the both the main amplifier (MA) and error amplifier (EA). Using a nonlinear EA is a deviation from the traditional FFPA. A loop control algorithm is proposed that offsets the alignment setting from the standard value to best utilize the power handling capability and linearity of the MA and EA. A system efficiency of 25% is achieved for a rated output power of 52.7 dBm, while exceeding the WCDMA specifications. Reducing the peak-to-average power ratio (PAPR) of the input signal to 8 dB and using offset control improves the ACLR performance to -62 dBc.\",\"PeriodicalId\":128968,\"journal\":{\"name\":\"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)\",\"volume\":\"62 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2013-06-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"7\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/MWSYM.2013.6697336\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MWSYM.2013.6697336","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
High efficiency feedforward power amplifier using a nonlinear error amplifier and offset alignment control
A high efficiency feedforward power amplifier (FFPA) is proposed that uses the Doherty configuration for the both the main amplifier (MA) and error amplifier (EA). Using a nonlinear EA is a deviation from the traditional FFPA. A loop control algorithm is proposed that offsets the alignment setting from the standard value to best utilize the power handling capability and linearity of the MA and EA. A system efficiency of 25% is achieved for a rated output power of 52.7 dBm, while exceeding the WCDMA specifications. Reducing the peak-to-average power ratio (PAPR) of the input signal to 8 dB and using offset control improves the ACLR performance to -62 dBc.
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