Comparative study of two Multilevel converters for Envelope amplifier

Vasic, Miroslav; García Suárez, Oscar; Oliver Ramírez, Jesús Angel; Alou Cervera, Pedro; Díaz López, Daniel y Cobos Márquez, José Antonio (2009). Comparative study of two Multilevel converters for Envelope amplifier. En: "15th International Symposium on Power Electronics, EE 2009", 28/10/2009 - 30/10/2009, Novi Sad, Serbia.

Descripción

Título: Comparative study of two Multilevel converters for Envelope amplifier
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: 15th International Symposium on Power Electronics, EE 2009
Fechas del Evento: 28/10/2009 - 30/10/2009
Lugar del Evento: Novi Sad, Serbia
Título del Libro: Proceedings of 15th International Symposium on Power Electronics, EE 2009
Fecha: 2009
Materias:
Palabras Clave Informales: Power Amplifiers, Kahn’s Tehcnique, Envelope Amplifiers
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 low peak-toaverage 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 compares two solutions for the envelope amplifier based on a combination of multilevel converter and linear regulator. The solutions are compared regarding their efficiency, size and weight. Both solutions can reproduce any signal with maximal spectral component of 1 MHz and give instantaneous maximal 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

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ID de Registro: 5559
Identificador DC: http://oa.upm.es/5559/
Identificador OAI: oai:oa.upm.es:5559
Depositado por: Memoria Investigacion
Depositado el: 11 Ene 2011 11:38
Ultima Modificación: 20 Abr 2016 14:20
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