Alt, Alexander ![]() ![]() ![]() |
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Abstract
Envelope tracking and asymmetric Doherty power amplifiers are two techniques that can be used to achieve high average efficiencies when amplifying signals with high peak-toaverage power ratios, e.g. those employed in modern wireless communication standards. In this paper, a combination of the two techniques, the modulation of the drain voltage of the peaking amplifier in an asymmetric Doherty power amplifier, is described. It is demonstrated how this combination can increase the efficiency in the high-power range while reducing the AM/PM distortion of the DPA. Additionally, the degrees of freedom in terms of efficiency, linearity, and linearisability when designing the shaping function is discussed. Measurements of an asymmetric 2.4 GHz DPA using 10 W and 25 W GaN HEMTs prove the concept and demonstrate the achievable improvements in terms of efficiency, linearity, and linearisability.
Item Type: | Conference or Workshop Item (Paper) |
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Date Type: | Publication |
Status: | Published |
Schools: | Engineering |
Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
Publisher: | IEEE |
ISBN: | 978-2-87487-047-7 |
Related URLs: | |
Date of First Compliant Deposit: | 31 July 2017 |
Last Modified: | 05 Jan 2024 08:27 |
URI: | https://orca.cardiff.ac.uk/id/eprint/103120 |
Citation Data
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