Power Amplifier Principles and Modern Design Techniques

Prodanov, V.; Banu, M.

doi:10.1201/9780849379970.ch13

Cited by 8 publications

(3 citation statements)

References 44 publications

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“…Lee de Forest in 1906 [1]. Particularly, power amplifiers (PAs) played a significant role in the development of radio, television, and telephone communications in the last century.…”

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confidence: 99%

“…At the end of the 20 th century and the beginning of the 21 st century, the introduction of integrated circuit (IC) technology and consumer demand in cellular technologies brought new challenges in PA design. 1 Robert von Lieben also developed a triode independently around the same time. As politics would have it, this incited a lawsuit between the two [4].…”

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confidence: 99%

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Constant Conduction Angle Biasing for Class C Monolithic RF Power Amplifiers

Singh

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“…Lee de Forest in 1906 [1]. Particularly, power amplifiers (PAs) played a significant role in the development of radio, television, and telephone communications in the last century.…”

Section: Listing Of Figuresmentioning

confidence: 99%

Section: Listing Of Figuresmentioning

confidence: 99%

Constant Conduction Angle Biasing for Class C Monolithic RF Power Amplifiers

Singh

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“…To minimize the impedance mismatch problem and maintain high efficiency for amplification of a signal with a high PAPR, the PA should be optimized in the high power generation region of the signal distribution [6], [8]. We also discuss another important design issue: suitable shaping method of the envelope voltage applied to PAs to solve linearity issues and achieve better power performance [8], [9]. In addition, losses in the supply modulator are considered.…”

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confidence: 99%

Linear Power-Efficient RF Amplifier with Partial Positive Feedback

King

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Over the last decade, the number of mobile wireless devices on the market has increased substantially. New "multi-carrier" modulation schemes, such as OFDM, WCDMA, and WiMAX, have been developed to accommodate the increasing number of wireless subscribers and the demand for faster data rates within the limited commercial frequency spectrum. These complex modulation schemes create signals with high peak-to-average power ratios (PAPR), exhibiting rapid changes in the signal magnitude. To accommodate these high-PAPR signals, RF power amplifiers in mobile devices must operate under backed-off gain conditions, resulting in poor power efficiency. Various efficiency-enhancement solutions have been realized for backed-off devices to combat this issue.A brief overview of one of the more extensively researched solutions, the Doherty amplifier, is given, and its inherent limitations are discussed. A recently proposed amplifier topology that provides the efficiency benefits of the Doherty amplifier, while overcoming some of the fundamental problems that plague the standard Doherty architecture, is investigated. A step-by-step design methodology is presented and confirmed by extensive simulation in Agilent ADS. A design example, tuned for maximum efficiency at peak output power, is implemented on a PCB and tested to verify the validity of the proposed circuit configuration.iv ACKNOWLEDGMENTS I would first like to thank Dr. Vladimir Prodanov for the opportunity to work on such a fascinating and challenging project. Without his expertise in the field of amplifier design and his patience and willingness to spend long hours in the laboratory with me, the completion of this project would not have been possible.

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