High Efficiency Power Amplifier for High Frequency Radio Transmitters

Vasic, Miroslav and García Suárez, Oscar and Oliver Ramírez, Jesús Angel and Alou Cervera, Pedro and Díaz López, Daniel and Cobos Márquez, José Antonio and Gimeno Martín, Alejandro and Pardo Martin, José Manuel and Benavente Peces, César and Ortega González, Francisco Javier (2010). High Efficiency Power Amplifier for High Frequency Radio Transmitters. In: "25th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2010", 21/02/2010 - 25/02/2010, Palm Springs, California, USA. ISBN 978-1-4244-4782-4.

Description

Title: High Efficiency Power Amplifier for High Frequency Radio Transmitters
Author/s:
  • Vasic, Miroslav
  • García Suárez, Oscar
  • Oliver Ramírez, Jesús Angel
  • Alou Cervera, Pedro
  • Díaz López, Daniel
  • Cobos Márquez, José Antonio
  • Gimeno Martín, Alejandro
  • Pardo Martin, José Manuel
  • Benavente Peces, César
  • Ortega González, Francisco Javier
Item Type: Presentation at Congress or Conference (Article)
Event Title: 25th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2010
Event Dates: 21/02/2010 - 25/02/2010
Event Location: Palm Springs, California, USA
Title of Book: Proceedings of the 25th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2010
Date: 2010
ISBN: 978-1-4244-4782-4
Subjects:
Faculty: E.U.I.T. Telecomunicación (UPM)
Department: Ingeniería de Circuitos y Sistemas [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Modern transmitters usually have to amplify and transmit complex communication 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 employed 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. 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 solutions for the power supply that acts as the envelope amplifier and class E amplifier that is used as a nonlinear amplifier. The envelope amplifier is implemented as a multilevel converter in series with a linear regulator and can provide up to 100 W of peak power and reproduce sine wave of 2 MHz, while the implemented class E amplifier operates at 120 MHz with an efficiency near to 90%. The envelope amplifier and class E amplifier have been integrated in order to implement the Kahn's technique transmitter and series of experiments have been conducted in order to characterize the implemented transmitter.

More information

Item ID: 7363
DC Identifier: http://oa.upm.es/7363/
OAI Identifier: oai:oa.upm.es:7363
Official URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5433587
Deposited by: Memoria Investigacion
Deposited on: 13 Jul 2011 11:41
Last Modified: 20 Apr 2016 16:30
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