An 60 W Average Power Wideband Amplifier with Envelope Tracking for DVB-T Applications
D. Maassen1, L. Schenk2, M. Muessener2, P. Muehlbacher2, U. Dalisda2 and G. Boeck1,3
Published in:
Proc. 46th European Microwave Conf. (EuMC 2016), London, UK, Oct. 4-6, pp. 823-826 (2016).
Abstract:
In this paper, the development of a DVB-T power amplifier (PA) with enhanced efficiency performance based on the envelope tracking method (ET) is described. The amplifier works in the ultrahigh frequency (UHF) band from 470 to 803 MHz. The PA consists of two coupled push-pull stages of laterally diffused metal oxide semiconductors (LDMOS) that are combined and equipped with a multilevel Supply Modulator to achieve a drain modulation. The results indicate an improved drain efficiency within 14.6% up to &ny;≥42% for a 8MHz coded orthogonal frequency division multiplexing (COFDM) - signal with 9 dB peak-to-average power ratio (PAPR) including the losses of the Supply Modulator. While fulfilling the spectrum mask, the output power is higher than 60 W (470 W peak) for the frequency range from 470 - 803 MHz.
1 Microwave Engineering Laboratory, Berlin Institute of Technology, Berlin, Germany
2 Rohde&Schwarz GmbH&Co.KG, Munich / Berlin, Germany
3 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, 12489 Berlin, Germany
Index Terms:
DC-DC power converters, digital video broadcasting, envelope tracking, orthogonal frequency division multiplexing, power amplifiers.
Copyright © 2016 EuMA. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the EuMA.
Full version in pdf-format.