Switching capacities based envelope amplifier for high efficiency RF amplifiers

Vasic, Miroslav; García Suárez, Oscar; Oliver Ramírez, Jesús Angel; Alou Cervera, Pedro y Cobos Márquez, José Antonio (2010). Switching capacities based envelope amplifier for high efficiency RF amplifiers. En: "25th Annual IEEE Applied Power Electronics Conference and Exposition (APEC)", 21/02/2010 - 25/02/2010, Palm Springs, California, EEUU. ISBN 978-1-4244-4782-4.

Descripción

Título: Switching capacities based envelope amplifier for high efficiency RF amplifiers
Autor/es:
  • Vasic, Miroslav
  • García Suárez, Oscar
  • Oliver Ramírez, Jesús Angel
  • Alou Cervera, Pedro
  • Cobos Márquez, José Antonio
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 25th Annual IEEE Applied Power Electronics Conference and Exposition (APEC)
Fechas del Evento: 21/02/2010 - 25/02/2010
Lugar del Evento: Palm Springs, California, EEUU
Título del Libro: Proceedings of 25th Annual IEEE Applied Power Electronics Conference and Exposition (APEC)
Fecha: 2010
ISBN: 978-1-4244-4782-4
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

Modern transmitters usually have to amplify and transmit signals with simultaneous envelope and phase modulation. Due to this property of the transmitted signal, 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 high peak-to-average power ratio (PAPR). The Kahn envelope elimination and restoration (EER) technique is used to enhance efficiency of RF transmitters, by combining highly efficient, nonlinear RF amplifier (class 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 multilevel converter in series with a linear regulator. The multilevel converter is implemented by employing voltage dividers based on switching capacities. The implemented envelope amplifier can reproduce any signal with maximum spectral component of 2 MHz and give instantaneous maximum power of 50 W. The efficiency measurements show that when the signals with low average value are transmitted, the implemented prototypes have up to 20% higher efficiency than linear regulator that is used as a conventional solution.

Más información

ID de Registro: 7819
Identificador DC: http://oa.upm.es/7819/
Identificador OAI: oai:oa.upm.es:7819
URL Oficial: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5433590&tag=1
Depositado por: Memoria Investigacion
Depositado el: 02 Ago 2011 11:49
Ultima Modificación: 20 Abr 2016 16:50
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