@inproceedings{27e840ea350b4869a76819945e956488,
title = "Load modulated balanced mm-Wave CMOS PA with integrated linearity enhancement for 5G applications",
abstract = "The paper presents an mm-Wave load modulated balanced amplifier (LMBA) architecture across 30-40 GHz. The architecture is implemented with a transformer-based hybrid at input and output to allow wideband power combining and achieve high isolation with a control PA for load-modulation and back-off efficiency enhancement across 30-40 GHz. To overcome the compressive behaviour of an LMBA and enhance linearity, an integrated adaptive biasing is integrated on-chip allowing superior ACLR performance across 30-40 GHz. Under CW excitation, the two-stage LMBA demonstrates output power of 18.5-20 dBm, output drain efficiency >30% across 30-40 GHz. The modulation capabilities of LMBA are tested using a 64 QAM signal with a data rate of 6 Gbps wherein PA demonstrates EVM of -26.4 dB and ACLR of -29 dBc at an average output power of 10.6 dBm. To the best of the authors' knowledge, this is the first load-modulated balanced PA at mmWave in silicon. ",
keywords = "5G, Hybrid, Load modulation, Nun-Wave, Power amplifier, Transformer",
author = "Chappidi, {Chandrakanth R.} and Tushar Sharma and Zheng Liu and Kaushik Sengupta",
note = "Funding Information: ACKNOWLEDGMENT We would like to acknowledge Semiconductor research Corporation (SRC) for funding support through the TxAce program. We would also like to thank our liaisons Krishnanshu Dandu(TI), Saeid Daneshgar(Intel) and Khurram Wahid (NXP), and all members of IMRL team for technical discussions. Publisher Copyright: {\textcopyright} 2020 IEEE.; 2020 IEEE/MTT-S International Microwave Symposium, IMS 2020 ; Conference date: 04-08-2020 Through 06-08-2020",
year = "2020",
month = aug,
doi = "10.1109/IMS30576.2020.9224038",
language = "English (US)",
series = "IEEE MTT-S International Microwave Symposium Digest",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "1101--1104",
booktitle = "IMS 2020 - 2020 IEEE/MTT-S International Microwave Symposium",
address = "United States",
}