{"title":"一种改进的基于δ - σ调制的Kahn发射机结构","authors":"Y. Wang","doi":"10.1109/MWSYM.2003.1212615","DOIUrl":null,"url":null,"abstract":"A new architecture for linear high efficiency power amplifiers and transmitters is proposed. The essential idea is to apply delta-sigma modulation to the signal envelopes in the Kahn transmitters. While in traditional Kahn techniques the original signal envelope is restored before the final-stage power amplifier is modulated, in the proposed scheme, the power amplifier undergoes digital modulations and the signal envelope is restored from passing through a high Q bandpass filter at the output. Simulations based on power GaAs FET models show 31% improvements on power efficiency and 5 dB improvement in IM3 compared to traditional Kahn techniques.","PeriodicalId":252251,"journal":{"name":"IEEE MTT-S International Microwave Symposium Digest, 2003","volume":"89 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2003-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"97","resultStr":"{\"title\":\"An improved Kahn transmitter architecture based on delta-sigma modulation\",\"authors\":\"Y. Wang\",\"doi\":\"10.1109/MWSYM.2003.1212615\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A new architecture for linear high efficiency power amplifiers and transmitters is proposed. The essential idea is to apply delta-sigma modulation to the signal envelopes in the Kahn transmitters. While in traditional Kahn techniques the original signal envelope is restored before the final-stage power amplifier is modulated, in the proposed scheme, the power amplifier undergoes digital modulations and the signal envelope is restored from passing through a high Q bandpass filter at the output. Simulations based on power GaAs FET models show 31% improvements on power efficiency and 5 dB improvement in IM3 compared to traditional Kahn techniques.\",\"PeriodicalId\":252251,\"journal\":{\"name\":\"IEEE MTT-S International Microwave Symposium Digest, 2003\",\"volume\":\"89 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2003-06-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"97\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE MTT-S International Microwave Symposium Digest, 2003\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/MWSYM.2003.1212615\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE MTT-S International Microwave Symposium Digest, 2003","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MWSYM.2003.1212615","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
An improved Kahn transmitter architecture based on delta-sigma modulation
A new architecture for linear high efficiency power amplifiers and transmitters is proposed. The essential idea is to apply delta-sigma modulation to the signal envelopes in the Kahn transmitters. While in traditional Kahn techniques the original signal envelope is restored before the final-stage power amplifier is modulated, in the proposed scheme, the power amplifier undergoes digital modulations and the signal envelope is restored from passing through a high Q bandpass filter at the output. Simulations based on power GaAs FET models show 31% improvements on power efficiency and 5 dB improvement in IM3 compared to traditional Kahn techniques.
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