P. Chen, A. Alt, J. M. Moreno Rubio, S. Alsahali, J. Lees, R. Quaglia, M. Casbon, P. Tasker
{"title":"Optimising Linearity of Envelope Tracking Power Amplifier Using Baseband Linearisation Approach","authors":"P. Chen, A. Alt, J. M. Moreno Rubio, S. Alsahali, J. Lees, R. Quaglia, M. Casbon, P. Tasker","doi":"10.1109/INMMiC46721.2020.9160347","DOIUrl":null,"url":null,"abstract":"The aim of this paper is to improve the linearity of an envelope tracking (ET) power amplifier (PA) using a simple baseband linearisation approach (BLA), which releases the requirement for the ET-customised digital predistortion (DPD) techniques. The proposed BLA is verified through the comparative study on a Gallium Nitride (GaN) PA with ET and a 28V supply voltage. A two-tone signal and a 20MHz modulated signal are used in the measurement, which demonstrates that in contrast to the 28 V case, the ET PA using BLA can simultaneously achieve higher efficiency and better linearity. To investigate the linearity improvement of using BLA, the constellation diagrams, AM/AM and AM/PM characteristics with and without generalized memory polynomial (GMP)-based DPD are measured and analysed.","PeriodicalId":255226,"journal":{"name":"2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/INMMiC46721.2020.9160347","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
The aim of this paper is to improve the linearity of an envelope tracking (ET) power amplifier (PA) using a simple baseband linearisation approach (BLA), which releases the requirement for the ET-customised digital predistortion (DPD) techniques. The proposed BLA is verified through the comparative study on a Gallium Nitride (GaN) PA with ET and a 28V supply voltage. A two-tone signal and a 20MHz modulated signal are used in the measurement, which demonstrates that in contrast to the 28 V case, the ET PA using BLA can simultaneously achieve higher efficiency and better linearity. To investigate the linearity improvement of using BLA, the constellation diagrams, AM/AM and AM/PM characteristics with and without generalized memory polynomial (GMP)-based DPD are measured and analysed.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
