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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/8369
Title: Hybrid Analog/Digital Continuous Class B/J Mode for Broadband Doherty Power Amplifiers
Authors: Ghosh S.
Rawat, Karun
Published in: IEEE Access
Abstract: In this paper, a new digitally driven two input continuous mode Doherty power amplifier (DPA) architecture is proposed along with an analytical-based generic output combiner network design methodology. The load combiner provides the designer a choice to meet the optimum performance for any arbitrary back-off as well as for saturation. The PA's performance is further optimized with digital input splitting. To verify the proposed theory, a 20-W symmetrical continuous mode DPA is designed using 10-W GaN HEMTs. The proposed amplifier shows a drain efficiency between 56.0% and 75.4% at 41.4-44.6 dBm saturation power and between 45% and 56.5% at 35.7-38.5 dBm output power corresponding to 6-dB back-off. This performance is achieved over the band from 1.25 to 2.3 GHz that corresponds to 59.15% fractional bandwidth. The proposed hybrid analog/digital continuous mode DPA prototype is implemented using field-programmable gate array (FPGA)/DSP platform and qualifies the spectral mask when excited by a modulated long term evolution signal along with digital predistortion. © 2013 IEEE.
Citation: IEEE Access (2019), 7(): 74986-74995
URI: https://doi.org/10.1109/ACCESS.2019.2920487
http://repository.iitr.ac.in/handle/123456789/8369
Issue Date: 2019
Publisher: Institute of Electrical and Electronics Engineers Inc.
Keywords: back-off
Broadband DPA
continuous mode
digital phase compensation
high efficiency
ISSN: 21693536
Author Scopus IDs: 57204465879
57000644800
Author Affiliations: Ghosh, S., Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Rawat, K., Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Funding Details: This work was supported in part by the Department of Science and Technology, Government of India, IMPRINT under Grant IMP-1305-ECD, and in part by the SERB, Department of Science and Technology, Government of India, under Grant CGR/2018/003869.
Corresponding Author: Ghosh, S.; Department of Electronics and Communication Engineering, Indian Institute of Technology RoorkeeIndia; email: sujata.ghosh@ieee.org
Appears in Collections:Journal Publications [ECE]

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