A highly-efficient RF polar transmitter using SiGe power amplifier and CMOS envelope-tracking amplifier for mobile WiMAX

Yan Li, Po Hsing Wu, Jerry Lopez, Ruili Wu, Donald Y.C. Lie, Kevin Chen, Stanley Wu, Tzu Yi Yang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

This paper presents a large-signal envelope-tracking (ET) polar transmitter (TX) system with a monolithic cascode SiGe power amplifier (PA) for mobile WiMAX applications. The envelope amplifiers are designed in the TSMC 0.35μm SiGe BiCMOS technology and also with discrete components for comparisons. The entire polar TX system using the discrete envelope amplifier in measurement achieves the power-added efficiency (PAE) of 30% at the average output power of 18 dBm with the EVM of 5% for WiMAX 64QAM 10 MHz signal. The RF/analog/digital co-simulations of the entire polar TX system with the integrated CMOS envelope amplifier show similar linearity and efficiency performances when compared with the measurement results. Both the simulation and measurement data suggests our polar TX design achieves the highest PAE among the state-of-the-art Si-based OFDM polar TX systems reported in the literature.

Original languageEnglish
Title of host publicationProceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011
Pages200-203
Number of pages4
DOIs
StatePublished - 2011
Event2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011 - Hsinchu, Taiwan, Province of China
Duration: Apr 25 2011Apr 28 2011

Publication series

NameProceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011

Conference

Conference2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011
Country/TerritoryTaiwan, Province of China
CityHsinchu
Period04/25/1104/28/11

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