Power Amplifier Design Optimized for Envelope Tracking

Collins, Gayle; Fisher, Jeremy; Radulescu, Fabian; Barner, J. B.; Sheppard, S.T.; Worley, R.; Kimball, D.

doi:10.1109/csics.2014.6978573

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…This implies that PA's must be designed for high Peak to Average Power Ratio (PAPR) implementing techniques for providing efficient operation at average power levels. Several techniques have been implemented over the past few decades to efficiently amplify high PAPR signals such Envelope Tracking, Doherty, EER [2], [3], [4] and sometimes a mixed approach of these techniques. In conventional transmitter architectures, signal modulation and DC-RF energy conversion (by PA's) are implemented as separate building blocks of the overall system.…”

Section: Introductionmentioning

confidence: 99%

High speed and highly efficient S-band 20 W mixerless vector power modulator

Dasgupta

Disserand

Nébus

et al. 2017

2017 IEEE MTT-S International Microwave Symposium (IMS)

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This paper presents a performance evaluation of an original highly efficient and linear GaN-HEMT Vector Power Modulator (VPM) based on the design of a two-stage saturated variable gain (SVG) amplifier and a multi-level discrete supply modulator (SM). The proposed novel architecture for transforming a digital baseband data stream into an RF Vector modulated power waveform (RF Power DAC) is validated using a specific laboratory test bench. The main objective of this study is to merge signal modulation and DC to RF energy conversion functions into a single and compact GaN based mixer-less circuit. Using high-voltage 50 V GaN technology, a 20 W S-band vector power modulator having overall average PAE of around 40 % is reported. The concept demonstrator is experimentally validated up to 100 Msymbols/sec 16-QAM modulation scheme. Functional time alignment with phase and amplitude compensation procedure focusing on measured constellation at 40 Msymbols/sec enables to reach excellent EVM performances of around 3.2 %.

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Section: Introductionmentioning

confidence: 99%

High speed and highly efficient S-band 20 W mixerless vector power modulator

Dasgupta

Disserand

Nébus

et al. 2017

2017 IEEE MTT-S International Microwave Symposium (IMS)

View full text Add to dashboard Cite

show abstract

“…This effect leads to the operation of the amplifier at back-off levels below saturation to ensure signal integrity (linearity) and by doing so the efficiency is degraded considerably. This implies that the PA must be designed for high PAPR implementing techniques for providing efficient operation at average power levels [1].…”

Section: Introductionmentioning

confidence: 99%