Moreno Rubio, Jorge Julian ![]() ![]() ![]() |
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Abstract
This paper presents a novel technique for the design of broadband Doherty power amplifiers (DPAs), supported by a simplified approach for the initial bandwidth estimation that requires linear simulations only. The equivalent impedance of the Doherty inverter is determined by the value of the output capacitance of the power device, and the Doherty combiner is designed following this initial choice and using a microstrip network. A GaN-based single-input DPA designed adopting this method exhibits, on a state-of-the-art bandwidth of 87% (1.5-3.8 GHz), a measured output power of around 20 W with 6 dB back-off efficiency between 33% and 55%, with a gain higher than 10 dB. System-level measurements prove the linearizability of the designed Doherty amplifier when a modulated signal is applied.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Engineering |
Additional Information: | This is an open access article under the terms of the CC-BY Attribution 4.0 International license. |
Publisher: | Institute of Electrical and Electronics Engineers (IEEE) |
ISSN: | 0018-9480 |
Date of First Compliant Deposit: | 9 October 2017 |
Date of Acceptance: | 5 October 2017 |
Last Modified: | 05 May 2023 04:05 |
URI: | https://orca.cardiff.ac.uk/id/eprint/105349 |
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