Comparison of Two Multilevel Architectures for Envelope Amplifier

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). Comparison of Two Multilevel Architectures for Envelope Amplifier. In: "35th Annual Conference of IEEE Industrial Electronics, 2009. IECON '09", 03/11/2009 - 05/11/2009, Oporto, Portugal. ISBN 978-1-4244-4650-6. https://doi.org/10.1109/IECON.2009.5414936.

Description

Title: Comparison of Two Multilevel Architectures for Envelope Amplifier
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: 35th Annual Conference of IEEE Industrial Electronics, 2009. IECON '09
Event Dates: 03/11/2009 - 05/11/2009
Event Location: Oporto, Portugal
Title of Book: Proceedings of the 35th Annual Conference of IEEE Industrial Electronics, 2009. IECON '09
Date: 2009
ISBN: 978-1-4244-4650-6
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 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 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 19% higher efficiency than linear regulator that is used as a conventional solution.

More information

Item ID: 5532
DC Identifier: http://oa.upm.es/5532/
OAI Identifier: oai:oa.upm.es:5532
DOI: 10.1109/IECON.2009.5414936
Official URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5414936
Deposited by: Memoria Investigacion
Deposited on: 20 Dec 2010 12:51
Last Modified: 20 Apr 2016 14:19
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