Design of Unsymmetrical Doherty Power Amplifier for 460MHz LTE-Advanced Applications

DOI

10.2991/isccca.2013.100How to use a DOI?

Keywords

unsymmetrical, Doherty power amplifier, output matching networks, LTE-Advanced

Abstract

An unsymmetrical Doherty power amplifier (DPA) at 460MHz is presented in this paper. The carrier and peaking amplifier of the DPA, which base on two equal-sized devices, are matched with different networks to mitigate the performance degradation caused by the limited load modulation. Measured with continuous wave (CW), the unsymmetrical DPA saturates at an output power of 49.2dBm and achieves a drain efficiency of 51% at 6dB back-off. Using a one-carrier long term evolution advanced (LTE-Advanced) signal with 20MHz bandwidth, the unsymmetrical DPA exhibits a drain efficiency of 48.7% at an average output power of 42.1dBm, along with adjacent channel leakage ratio (ACLR) of -34.1dBc and -53.3dBc before and after digital pre-distortion (DPD), respectively.

Copyright

© 2013, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Chuanhui Ma
AU  - Wensheng Pan
AU  - Youxi Tang
AU  - Chaojin Qing
PY  - 2013/02
DA  - 2013/02
TI  - Design of Unsymmetrical Doherty Power Amplifier for 460MHz LTE-Advanced Applications
BT  - Proceedings of the 2nd International Symposium on Computer, Communication, Control and Automation (ISCCCA 2013)
PB  - Atlantis Press
SP  - 407
EP  - 410
SN  - 1951-6851
UR  - https://doi.org/10.2991/isccca.2013.100
DO  - 10.2991/isccca.2013.100
ID  - Ma2013/02
ER  -