{"title":"Advanced design of a double Doherty power amplifier with a flat efficiency range","authors":"Yong‐Sub Lee, Mun‐Woo Lee, S. Kam, Y. Jeong","doi":"10.1109/MWSYM.2010.5518217","DOIUrl":null,"url":null,"abstract":"This paper reports a new double Doherty power amplifier (DDPA) with a flat efficiency range, which consists of two-stage amplifiers. When the two-way DPA is used as the main peaking amplifier, the driving peaking cell with class-C bias turns the DPA off before the saturation of the main carrier amplifier. Three efficiency-peaking points are achieved with the additional Doherty operation by the main peaking amplifier after the saturation of the main carrier amplifier. For verifications, the driving and main amplifiers are designed and implemented with 2-W and 10-W GaN HEMTs, respectively, at 2.14 GHz. From the continuous wave (CW) results, three efficiency-peaking points are obtained at approximately 9-, 5-, and 0-dB back-off powers with over 42% drain efficiency. For one-carrier wide-band code division multiple access (WCDMA) signal, the DDPA shows good digital predistortion linearization performance.","PeriodicalId":341557,"journal":{"name":"2010 IEEE MTT-S International Microwave Symposium","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2010 IEEE MTT-S International Microwave Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MWSYM.2010.5518217","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
This paper reports a new double Doherty power amplifier (DDPA) with a flat efficiency range, which consists of two-stage amplifiers. When the two-way DPA is used as the main peaking amplifier, the driving peaking cell with class-C bias turns the DPA off before the saturation of the main carrier amplifier. Three efficiency-peaking points are achieved with the additional Doherty operation by the main peaking amplifier after the saturation of the main carrier amplifier. For verifications, the driving and main amplifiers are designed and implemented with 2-W and 10-W GaN HEMTs, respectively, at 2.14 GHz. From the continuous wave (CW) results, three efficiency-peaking points are obtained at approximately 9-, 5-, and 0-dB back-off powers with over 42% drain efficiency. For one-carrier wide-band code division multiple access (WCDMA) signal, the DDPA shows good digital predistortion linearization performance.
本文报道了一种由两级放大器组成的具有平坦效率范围的双Doherty功率放大器(DDPA)。当使用双向DPA作为主峰值放大器时，具有c类偏置的驱动峰值单元在主载波放大器饱和之前关闭DPA。在主载波放大器饱和后，主调峰放大器通过额外的Doherty运算实现了三个效率峰值点。为了验证，驱动放大器和主放大器分别采用2.14 GHz的2 w和10 w GaN hemt设计和实现。从连续波(CW)结果来看，在大约9 db、5 db和0 db的回退功率下获得了三个效率峰值点，漏极效率超过42%。对于单载波宽带码分多址(WCDMA)信号，DDPA具有良好的数字预失真线性化性能。
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