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

Ortega González, Francisco Javier; Patiño Gómez, Moisés; Sebastián Zuñiga, Francisco Javier; Fernández Miaja, Pablo y 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.

Descripción

Título: Design of a Two-Phase buck converter with fourth-order output filter for envelope amplifiers of limited bandwidth
Autor/es:
  • Ortega González, Francisco Javier
  • Patiño Gómez, Moisés
  • Sebastián Zuñiga, Francisco Javier
  • Fernández Miaja, Pablo
  • Rodríguez, Miguel
Tipo de Documento: Artículo
Título de Revista/Publicación: IEEE Transactions on Power Electronics
Fecha: Noviembre 2014
Volumen: 29
Materias:
Palabras Clave Informales: DC-DCpower converters, harmonic filters, power conversion harmonics, pulse width modulation converters, radiofrequency amplifiers.
Escuela: E.T.S.I. y Sistemas de Telecomunicación (UPM)
Departamento: Teoría de la Señal y Comunicaciones
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 35986
Identificador DC: http://oa.upm.es/35986/
Identificador OAI: oai:oa.upm.es:35986
Identificador DOI: 10.1109/TPEL.2013.2295035
URL Oficial: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6690225&filter%3DAND%28p_IS_Number%3A6850100%29%26pageNumber%3D2
Depositado por: Memoria Investigacion
Depositado el: 12 Feb 2016 18:07
Ultima Modificación: 12 Feb 2016 18:07
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