Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques最新文献

Multiband/multichannel power amplifier linearization 多波段/多通道功率放大器线性化

Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques Pub Date : 2019-08-12 DOI: 10.1049/pbcs071g_ch9

M. Rawat, P. Roblin

引用次数: 0

Envelope tracking techniques 信封跟踪技术

Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques Pub Date : 2019-08-12 DOI: 10.1049/pbcs071g_ch3

F. Balteanu

引用次数: 0

High-efficiency power amplifier design 高效功率放大器设计

Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques Pub Date : 2019-08-12 DOI: 10.1049/pbcs071g_ch1

A. Grebennikov, M. Thian, Narendra Kumar

引用次数: 0

Combiner synthesis for active load-modulationbased power amplifiers 基于有源负载调制的功率放大器的组合合成

Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques Pub Date : 2019-08-12 DOI: 10.1049/pbcs071g_ch5

M. Ozen, W. Hallberg, C. Fager

引用次数: 1

Back Matter 回到问题

Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques Pub Date : 2019-08-12 DOI: 10.1049/pbcs071g_bm

引用次数: 0

Power amplifier design based on nonlinear embedding models with design examples 基于非线性嵌入模型的功放设计，并附设计实例

Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques Pub Date : 2019-08-12 DOI: 10.1049/pbcs071g_ch6

P. Roblin, K. Rawat

引用次数: 0

Outphasing power amplifiers 同相功率放大器

Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques Pub Date : 2019-08-12 DOI: 10.1049/pbcs071g_ch4

T. Barton, Paolo Enrico de Falco

{"title":"Outphasing power amplifiers","authors":"T. Barton, Paolo Enrico de Falco","doi":"10.1049/pbcs071g_ch4","DOIUrl":"https://doi.org/10.1049/pbcs071g_ch4","url":null,"abstract":"This chapter presents a comprehensive introduction to the outphasing architecture, with particular focus on nonisolating outphasing techniques. When efficiency at output power back-off is required, the outphasing technique presents a significant advantage over conventional single-ended PAs. This performance benefit comes, as is typical in efficiency enhancement architectures, at the expense of complexity, linearity, and bandwidth. Nonetheless, when digital predistortion and the associated complexity can be tolerated, outphasing is clearly beneficial for systems using high peak-to-average power ratio signals. A direct comparison to other efficiency enhancement techniques is made complicated by the large trade-off space in efficiency, linearity, complexity, and so on. It is of interest, however, to consider a comparison to the popular Doherty PA (DPA). The main difference between these two techniques lies in how the branch PAs are operated. In outphasing systems, the branch PAs are driven identically, with both branch PAs operating in saturation in the outphasing regime and in back off at low output power levels. In Doherty PAs, on the other hand, in the higherpower regime only the main PA is operated at full voltage swing, while in back-off the auxiliary PA is completely off. As a result, at high output powers the outphasing PA has theoretically higher achievable efficiency, and better utilization of the device periphery at low power levels.","PeriodicalId":241838,"journal":{"name":"Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131057987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Behavioral modeling and linearization 行为建模和线性化

Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques Pub Date : 2019-08-12 DOI: 10.1049/pbcs071g_ch8

R. Braithwaite

{"title":"Behavioral modeling and linearization","authors":"R. Braithwaite","doi":"10.1049/pbcs071g_ch8","DOIUrl":"https://doi.org/10.1049/pbcs071g_ch8","url":null,"abstract":"This chapter describes the linearization of power amplifiers (PAs) used in radio frequency (RF) transmitters. An overview of wireless communications is provided to establish the context of how the transmitter is used and the importance of the PA. Measures and models of the PA nonlinearity are reviewed, after which the core topic of PA linearization is presented. Selected techniques for PA linearization are discussed. The most popular is digital predistortion (DPD), where the correction signal is applied in the digital domain prior to the PA. Also covered are adaptive methods used to estimate the DPD coefficients that optimize the system. Feedforward compensation is presented as an analog technique for linearization, where the correction is applied in the RF domain after the PA. The chapter is concluded with a section on more detailed discussions of selected topics. Topics include the use of both odd and even polynomial terms in the modeling of PA nonlinearity and predistortion, the effect of PA saturation on the estimation of DPD coefficients, modifications used to make descent-based estimators more robust, batch processing for coefficient estimation, and the recursive least squares (LS) (RLS) estimator.","PeriodicalId":241838,"journal":{"name":"Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117346573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Distributed power amplifiers 分布式功率放大器

Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques Pub Date : 2019-08-12 DOI: 10.1049/pbcs071g_ch10

A. Grebennikov, Narendra Kumar

{"title":"Distributed power amplifiers","authors":"A. Grebennikov, Narendra Kumar","doi":"10.1049/pbcs071g_ch10","DOIUrl":"https://doi.org/10.1049/pbcs071g_ch10","url":null,"abstract":"The potential of traveling-wave or distributed amplification for obtaining power gains over very wide frequency bands has been recognized yet in the mid-1930s when it was found that the gain-bandwidth performance is greatly affected by the capacitance and transconductance of the conventional vacuum tube [1]. However, the first theoretical analysis and its practical verification were obtained for very broadband vacuum-tube amplifiers more than a decade later [2,3]. The basic concept was based on the idea to combine the interelectrode capacitances of the amplifying vacuum tubes with series wire inductors to form two lumped-element artificial transmission lines coupled by the tube transconductances. As a result, the distributed amplifier overcomes the difficulty of a conventional amplifier, whose frequency limit is determined by the factor which is proportional to the ratio of the transconductance of the tube to the square root of the product of its input grid- cathode and output anode-cathode capacitances, by paralleling the tubes in a special way, in which the capacitances of the tubes can be separated, while the transconductances may be added almost without limit and not affect the input and output of the device. Since the grid-cathode and anode-cathode capacitances form part of low-pass filters which can be made to have a substantially uniform response up to filter cutoff frequencies, whose value can be conveniently set within a wide range by suitable choice of the values of the external inductor coils, it became possible to provide amplification over much wider bandwidths than was achievable with conventional amplifiers.","PeriodicalId":241838,"journal":{"name":"Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114298449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CMOS power amplifiers CMOS功率放大器

Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques Pub Date : 2019-08-12 DOI: 10.1049/pbcs071g_ch7

A. Grebennikov, M. Acar

引用次数: 1