Design of a Two-Phase buck converter with fourth-order output filter for envelope amplifiers of limited bandwidth

Ortega González, Francisco Javier and Patiño Gómez, Moisés and Sebastián Zuñiga, Francisco Javier and Fernández Miaja, Pablo and Rodríguez, Miguel (2014). Design of a Two-Phase buck converter with fourth-order output filter for envelope amplifiers of limited bandwidth. "IEEE Transactions on Power Electronics", v. 29 (n. 11); pp. 5933-5948. ISSN 0885-8993. https://doi.org/10.1109/TPEL.2013.2295035.

Description

Title: Design of a Two-Phase buck converter with fourth-order output filter for envelope amplifiers of limited bandwidth
Author/s:
  • Ortega González, Francisco Javier
  • Patiño Gómez, Moisés
  • Sebastián Zuñiga, Francisco Javier
  • Fernández Miaja, Pablo
  • Rodríguez, Miguel
Item Type: Article
Título de Revista/Publicación: IEEE Transactions on Power Electronics
Date: November 2014
ISSN: 0885-8993
Volume: 29
Subjects:
Freetext Keywords: DC-DCpower converters, harmonic filters, power conversion harmonics, pulse width modulation converters, radiofrequency amplifiers.
Faculty: E.T.S.I. y Sistemas de Telecomunicación (UPM)
Department: Teoría de la Señal y Comunicaciones
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (21MB) | Preview

Abstract

The use of techniques such as envelope tracking (ET) and envelope elimination and restoration (EER) can improve the efficiency of radio frequency power amplifiers (RFPA). In both cases, high-bandwidth DC/DC converters called envelope amplifiers (EA) are used to modulate the supply voltage of the RFPA. This paper addresses the analysis and design of a modified two-phase Buck converter optimized to operate as EA. The effects of multiphase operation on the tracking capabilities are analyzed. The use of a fourth-order output filter is proposed to increase the attenuation of the harmonics generated by the PWM operation, thus allowing a reduction of the ratio between the switching frequency and the converter bandwidth. The design of the output filter is addressed considering envelope tracking accuracy and distortion caused by the side bands arising from the nonlinear modulation process. Finally, the proposed analysis and design methods are supported by simulation results, as well as demonstrated by experiments obtained using two 100-W, 10-MHz, two-phase Buck EAs capable of accurately tracking a 1.5-MHz bandwidth OFDM signal.

More information

Item ID: 35986
DC Identifier: http://oa.upm.es/35986/
OAI Identifier: oai:oa.upm.es:35986
DOI: 10.1109/TPEL.2013.2295035
Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6690225&filter%3DAND%28p_IS_Number%3A6850100%29%26pageNumber%3D2
Deposited by: Memoria Investigacion
Deposited on: 12 Feb 2016 18:07
Last Modified: 12 Feb 2016 18:07
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM