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Bandwidth Enhancement of Doherty Power Amplifier Using Modified Load Modulation Network
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| WBSDPA__final.pdf | 9.46 MB | Adobe PDF | Download |
| Title: | Bandwidth Enhancement of Doherty Power Amplifier Using Modified Load Modulation Network | Authors: | Li, Meng; Pang, Jingzhou; Li, Yue; Zhu, Anding | Permanent link: | http://hdl.handle.net/10197/11746 | Date: | Jun-2020 | Online since: | 2020-11-26T11:16:26Z | Abstract: | A novel Doherty power amplifier (DPA) architecture with extended bandwidth is presented in this paper. A modified load modulation network is introduced to provide impedance condition required by the Doherty operation in a wide frequency range. Analytical parameter solutions of the proposed load modulation network and the related load modulation process are presented. A DPA with 2.80-3.55 GHz bandwidth utilizing commercial GaN transistors is implemented. The fabricated DPA attains a measured 9.3-11.1 gain and 43.0-45.0 dBm saturated power. 50.0-60.6% and 66-78% drain efficiency is obtained at 6 dB output power back-off and saturation throughout the designed band, respectively. Moreover, the back-off drain efficiencies are higher than 55% within 700 MHz bandwidth. When driven by a 6-carrier 120 MHz OFDM signal with 7.0 dB peak to average power ratio, the proposed DPA achieves adjacent channel leakage ratio of better than -50 dBc after digital pre-distortion (DPD) at 3.20 GHz with average efficiency of 53.3%. | Funding Details: | European Commission Horizon 2020 Science Foundation Ireland |
Type of material: | Journal Article | Publisher: | IEEE | Journal: | IEEE Transactions on Circuits and Systems I: Regular Papers | Volume: | 67 | Issue: | 6 | Start page: | 1824 | End page: | 1834 | Copyright (published version): | 2020 IEEE | Keywords: | Broadband; Doherty power amplifier; High efficiency; Load modulation | DOI: | 10.1109/tcsi.2020.2972163 | Language: | en | Status of Item: | Peer reviewed | ISSN: | 1549-8328 | This item is made available under a Creative Commons License: | https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ |
| Appears in Collections: | Electrical and Electronic Engineering Research Collection |
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