@inproceedings{deb9377dd19249c1a56c9a820a7ced1a,
title = "RF IC design of highly-efficient broadband polar transmitters for WiMAX and 3GPP LTE applications",
abstract = "This paper presents highly-efficient RF polar transmitter (TX) systems that utilize the envelope-tacking (ET) technique with monolithic SiGe power amplifiers (PAs) for mobile WiMAX and 3GPP Long Term Evolution (LTE) applications. Monolithic single-ended cascode SiGe PA design capable of enhancing its power-added efficiency (PAE) is demonstrated. Four RF switches are adopted at the bases of the common-emitter transistors, which can be turned on/off in response to the desired output power. We found that self-biasing of the common-base device with ET can improve the output distortion of the cascode PA to output 18dBm and passing the stringent mobile WiMAX linearity specs with 30% PAE at 2.3GHz without predistortion. Furthermore, a differential cascode SiGe PA using the proposed ET-based polar TX system can improve the average output power to 21dBm with 33.6% PAE at 1.42 GHz, and it also passes the stringent LTE 16QAM linearity specs without needing predistortion.",
author = "Lie, {D. Y.C.} and Y. Li and J. Lopez and K. Chen and S. Wu and Yang, {T. Y.}",
year = "2010",
month = dec,
day = "1",
doi = "10.1109/ICSICT.2010.5667818",
language = "English",
isbn = "9781424457984",
series = "ICSICT-2010 - 2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology, Proceedings",
pages = "150--153",
booktitle = "ICSICT-2010 - 2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology, Proceedings",
note = "null ; Conference date: 01-11-2010 Through 04-11-2010",
}