Optimized Design of GaN Switching Capacitor Based Envelope Tracking Power Supply for Satellite Applications

Jin, Qian and Vasic, Miroslav and García Suárez, Oscar and Alou Cervera, Pedro and Oliver Ramírez, Jesús Angel and Cobos Márquez, José Antonio (2016). Optimized Design of GaN Switching Capacitor Based Envelope Tracking Power Supply for Satellite Applications. In: "Proceedings of Applied Power Electronics Conference (APEC 2016)", March 20 – 24, 2016, Long Beach, California. ISBN 978-1-4673-9550-2. pp. 2409-2414. https://doi.org/10.1109/APEC.2016.7468203.

Description

Title: Optimized Design of GaN Switching Capacitor Based Envelope Tracking Power Supply for Satellite Applications
Author/s:
  • Jin, Qian
  • Vasic, Miroslav
  • García Suárez, Oscar
  • Alou Cervera, Pedro
  • Oliver Ramírez, Jesús Angel
  • Cobos Márquez, José Antonio
Item Type: Presentation at Congress or Conference (Article)
Event Title: Proceedings of Applied Power Electronics Conference (APEC 2016)
Event Dates: March 20 – 24, 2016
Event Location: Long Beach, California
Title of Book: IEEE Applied Power Electronics Conference and Exposition (APEC 2016)
Date: 2016
ISBN: 978-1-4673-9550-2
Subjects:
Freetext Keywords: envelope tracking, switching capacitor, power amplifier, GaN device
Faculty: E.T.S.I. Industriales (UPM)
Department: Automática, Ingeniería Eléctrica y Electrónica e Informática Industrial
UPM's Research Group: Centro de Electrónica Industrial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In modern communication system, both the bandwidth and peak-to-average power ratio of the transmitted signal are increasing rapidly. As a result, the power amplifiers based on linear power amplifiers such as class A, B or AB suffer from very low efficiency. The most promising solutions are the Envelope Tracking (ET) and Envelope Elimination and Restoration (EER) techniques, which can greatly improve the efficiency by employing a dynamic power supply that tracks the envelope of the transmitted signal. This paper presents an implementation of the ET power supply based on a multilevel converter in series with a linear regulator for a satellite application. The multilevel converter consists of a switching capacitors based converter in order to have highly efficient and light solution because the weight of power supply, together with its efficiency, is of the outmost importance for the application. A prototype capable of following a 5MHz RF envelope signal with maximum output power of 40W is fabricated. The experimental results verify the effectiveness of the proposed solution with 96.15% efficiency for the multilevel converter and 75% for the ET power supply. Furthermore, an experimental comparison between Silicon and GaN transistors is conducted in order to verify the benefits of GaN transistors.

More information

Item ID: 46160
DC Identifier: http://oa.upm.es/46160/
OAI Identifier: oai:oa.upm.es:46160
DOI: 10.1109/APEC.2016.7468203
Official URL: http://ieeexplore.ieee.org/document/7468203/?reload=true
Deposited by: Memoria Investigacion
Deposited on: 29 May 2017 15:30
Last Modified: 01 Jun 2017 14:48
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