OperaV1, Main, Exploration, bibRecord, 001233

Outphasing Energy Recovery Amplifier With Resistance Compression for Improved Efficiency

Identifieur interne : 001233 ( Main/Exploration ); précédent : 001232; suivant : 001234

Outphasing Energy Recovery Amplifier With Resistance Compression for Improved Efficiency

Auteurs : Philip A. Godoy [États-Unis] ; David J. Perreault [États-Unis] ; Joel L. Dawson [États-Unis]

Source :

IEEE transactions on microwave theory and techniques [ 0018-9480 ] ; 2009.

RBID : Pascal:10-0026442

Descripteurs français

Pascal (Inist)
- Récupération énergie, Amplificateur puissance, Evaluation performance, Résistance électrique, Circuit combinateur, Redresseur, Alimentation électrique, Impédance, Puissance sortie, Linéarité, Commutation, Prototype, Conception système, Implémentation, Régime fonctionnement, Energie pointe, Modulation amplitude en quadrature, Rapport énergie pointe moyenne, Amplification linéaire, Radiofréquence, Amplificateur radiofréquence, Electronique puissance.
Wicri :
- topic : Prototype.

English descriptors

KwdEn :
- Combiner circuit, Energy recovery, Impedance, Implementation, Linear amplification, Linearity, Operating rate, Output power, Peak power, Peak to average power ratio, Performance evaluation, Power amplifier, Power electronics, Power supply, Prototype, Quadrature amplitude modulation, Radiofrequency, Radiofrequency amplifiers, Rectifier, Resistor, Switching, System design.

Abstract

We describe a new outphasing energy recovery amplifier (OPERA) which replaces the isolation resistor in the conventional matched combiner with a resistance-compressed rectifier for improved efficiency. The rectifier recovers the power normally wasted in the isolation resistor back to the power supply, while a resistance compression network (RCN) reduces the impedance variation of the rectifier as the output power varies. Because the combiner requires a fixed resistance at the isolation port to ensure matching and isolation between the two outphased power amplifiers (PAs), the RCN serves to maintain high linearity as well as high efficiency in the switching-mode PAs. For demonstration, a prototype OPERA system is designed and implemented with discrete components at an operating frequency of 48 MHz, delivering 20.8 W peak power with 82.9% PAE. The measurement results show an efficiency improvement from 17.9 % to 42.0 % for a 50-kHz 16-QAM signal with a peak-to-average power ratio of 6.5 dB.

Affiliations:

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Le document en format XML

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<term>Résistance électrique</term>
<term>Circuit combinateur</term>
<term>Redresseur</term>
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<front><div type="abstract" xml:lang="en">We describe a new outphasing energy recovery amplifier (OPERA) which replaces the isolation resistor in the conventional matched combiner with a resistance-compressed rectifier for improved efficiency. The rectifier recovers the power normally wasted in the isolation resistor back to the power supply, while a resistance compression network (RCN) reduces the impedance variation of the rectifier as the output power varies. Because the combiner requires a fixed resistance at the isolation port to ensure matching and isolation between the two outphased power amplifiers (PAs), the RCN serves to maintain high linearity as well as high efficiency in the switching-mode PAs. For demonstration, a prototype OPERA system is designed and implemented with discrete components at an operating frequency of 48 MHz, delivering 20.8 W peak power with 82.9% PAE. The measurement results show an efficiency improvement from 17.9 % to 42.0 % for a 50-kHz 16-QAM signal with a peak-to-average power ratio of 6.5 dB.</div>
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Outphasing Energy Recovery Amplifier With Resistance Compression for Improved Efficiency

Outphasing Energy Recovery Amplifier With Resistance Compression for Improved Efficiency

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri