Envelope Amplifieres Based on Two-Phase Buck Converters with 4th order filter

  1. Miaja, Pablo F. 1
  2. Sebastian, Javier 1
  3. Rodriguez, Alberto 1
  4. Patino-Gomez, Moises
  5. Tena-Ramos, David
  6. Ortega-Gonzalez, Francisco Javier
  1. 1 Universidad de Oviedo
    info

    Universidad de Oviedo

    Oviedo, España

    ROR https://ror.org/006gksa02

Proceedings:
10th European Space Power Conference, Proceedings, ESA Special Publication

ISSN: 1609-042X

ISBN: 9789292212834

Year of publication: 2014

Volume: 719

Pages: 25

Congress: European Space Power Conference (10th. 2014. Netherlands)

Type: Conference paper

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Abstract

Envelope Tracking (ET) is an option to improve the efficiency of Radio Frequency Power Amplifiers (RFPA). A high bandwidth DC/DC converter called Envelope Amplifiers (EA) is used to modulate the supply voltage of the RFPA. This paper analyzes the use of Two-Phase Buck converters as Envelope Amplifiers. The effect of the multiphase operation is analyzed regarding the tracking capabilities. A fourth order filter is employed to increase the attenuation of the harmonics generated by the PWM operation, then increasing the ratio between the switching frequency and the converter bandwidth. The filter is designed regarding the tracking accuracy and the side bands derived from the PWM modulation. Experimental results, using a two-phase converter operating at a switching frequency of 10 MHz are shown.

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Funding information

This work was supported by the Spanish Ministry of Education and Science under Consolider Project RUE CSD2009-00046, Project DPI2010-21110C02-0, and European Regional Development Fund (ERDF) grants.

Funders

  • Ministerio de Educación y Ciencia Spain
    • RUE CSD2009-00046
  • Ministerio de Educación y Ciencia Spain
    • DPI2010-21110C02-0