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Title: A broadband doherty power amplifier using class B/J continuum
Authors: Ghosh S.
Rawat K.
Published in: Proceedings of 2019 IEEE MTT-S International Microwave and RF Conference, IMARC 2019
Abstract: This brief presents implementation of a broadband Doherty power amplifier with enhanced performance in terms of bandwidth and efficiency. The bandwidth enhancement is achieved by incorporating continuous class B/J mode in designing main power amplifier of the architecture. A novel broadband combiner has been proposed in this paper. It takes care of the non-infinite impedance of the auxiliary power amplifier such that the back-off load trajectory of main power amplifier matches with that of class B/J continuum. The proposed theory is validated with a 20W Doherty power amplifier designed at 1.725 GHz. The measured results show that the circuit gives 45%-53% drain efficiency around 6-7 dB back-off, where, around 55% fractional bandwidth is achieved. The circuit also qualifies the spectral mask when characterized with a single carrier 5 MHz modulated signal. © 2019 IEEE.
Citation: Proceedings of 2019 IEEE MTT-S International Microwave and RF Conference, IMARC 2019, (2019)
Issue Date: 2019
Publisher: Institute of Electrical and Electronics Engineers Inc.
Keywords: 5G communication
Continuous Class B/J mode.
Efficiency enhancement
Index Terms - High output power
ISBN: 9781728140407
Author Scopus IDs: 57204465879
Author Affiliations: Ghosh, S., IIT Roorkee, ECE Department, Roorkee, Uttarakhand, India
Rawat, K., IIT Roorkee, ECE Department, Roorkee, Uttarakhand, India
Funding Details: The authors would like to acknowledge the support from the members of Wireless Communication Lab, IIT Roorkee and Dr. Meenakshi Rawat. The authors would also like to thank DST, Govt. of India for providing financial assistance through the project grant # CRG/2018/003869.
Appears in Collections:Conference Publications [ECE]

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