Multilevel Power Supply for High Efficiency RF Amplifiers

Vasic, Miroslav; García Suárez, Oscar; Oliver Ramírez, Jesús Angel; Alou Cervera, Pedro; Díaz López, Daniel y Cobos Márquez, José Antonio (2009). Multilevel Power Supply for High Efficiency RF Amplifiers. En: "24th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2009", 15/02/2009 - 19/02/2009, Washington, Estados Unidos . ISBN 978-1-4244-2811-3 . https://doi.org/10.1109/APEC.2009.4802821.

Descripción

Título: Multilevel Power Supply for High Efficiency RF Amplifiers
Autor/es:
  • Vasic, Miroslav
  • García Suárez, Oscar
  • Oliver Ramírez, Jesús Angel
  • Alou Cervera, Pedro
  • Díaz López, Daniel
  • Cobos Márquez, José Antonio
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 24th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2009
Fechas del Evento: 15/02/2009 - 19/02/2009
Lugar del Evento: Washington, Estados Unidos
Título del Libro: Proceedings of the 24th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2009
Fecha: 2009
ISBN: 978-1-4244-2811-3
Materias:
Escuela: E.T.S.I. Industriales (UPM)
Departamento: Automática, Ingeniería Electrónica e Informática Industrial [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

In radio systems linear power amplifiers (class A, B or AB) are usually used as a solution for the power amplifier stage. These amplifiers have high linearity, but suffer from low efficiency when the transmitted signal has low peak-to-average power ratio. The Kahn envelope elimination and restoration (EER) technique is used to enhance efficiency of RF transmitters, by combining highly efficient, nonlinear RF amplifier (class D or E) with a highly efficient envelope amplifier in order to obtain linear and highly efficient RF amplifier. This paper presents a solution for the envelope amplifier based on a combination of multilevel converter and linear regulator. The proposed solution can reproduce any signal with maximal spectral component of 2 MHz and give instantaneous maximal power of 50 W. The efficiency measurements show that when the signals with low average value are transmitted, it has up to 15% higher efficiency than linear regulator that is used as a conventional solution. Additionally, the algorithm for selection of voltage levels for the multilevel converter is explained, as well.

Más información

ID de Registro: 5515
Identificador DC: http://oa.upm.es/5515/
Identificador OAI: oai:oa.upm.es:5515
Identificador DOI: 10.1109/APEC.2009.4802821
URL Oficial: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4802821
Depositado por: Memoria Investigacion
Depositado el: 20 Dic 2010 10:49
Ultima Modificación: 20 Abr 2016 14:17
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