Envelope Amplifier for RF Amplifier based on Multilevel Converter

Vasic, Miroslav and García Suárez, Oscar and Oliver Ramírez, Jesús Angel and Alou Cervera, Pedro and Díaz López, Daniel and Cobos Márquez, José Antonio (2009). Envelope Amplifier for RF Amplifier based on Multilevel Converter. In: "XVI Seminario Anual de Automática, Electrónica Industrial e Instrumentación, SAAEI '09", 01/07/2009 - 03/07/2009, Madrid, España. ISBN 978-84-692-2596-7.

Description

Title: Envelope Amplifier for RF Amplifier based on Multilevel Converter
Author/s:
  • Vasic, Miroslav
  • García Suárez, Oscar
  • Oliver Ramírez, Jesús Angel
  • Alou Cervera, Pedro
  • Díaz López, Daniel
  • Cobos Márquez, José Antonio
Item Type: Presentation at Congress or Conference (Article)
Event Title: XVI Seminario Anual de Automática, Electrónica Industrial e Instrumentación, SAAEI '09
Event Dates: 01/07/2009 - 03/07/2009
Event Location: Madrid, España
Title of Book: Actas de XVI Seminario Anual de Automática, Electrónica Industrial e Instrumentación (SAAEI)
Date: 2009
ISBN: 978-84-692-2596-7
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Automática, Ingeniería Electrónica e Informática Industrial [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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 peakto-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 amplifierThis 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

More information

Item ID: 5612
DC Identifier: http://oa.upm.es/5612/
OAI Identifier: oai:oa.upm.es:5612
Official URL: http://www.saaei.org/
Deposited by: Memoria Investigacion
Deposited on: 10 Jan 2011 11:08
Last Modified: 20 Apr 2016 14:23
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