Chen, Peng, Alt, Alexander  ORCID: https://orcid.org/0000-0002-7621-4940, Moreno Rubio, Jorge, Alsahali, Sattam, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Casbon, Michael ORCID: https://orcid.org/0000-0002-8637-9888 and Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830
2020.
Optimising linearity of envelope tracking power amplifier using baseband linearisation approach.
Presented at: 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC),
Cardiff, Wales,
16-17 July 2020.
2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC).
IEEE,
pp. 1-3.
10.1109/INMMiC46721.2020.9160347
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Abstract
The aim of this paper is to improve the linearity of an envelope tracking (ET) power amplifier (PA) using a simple baseband linearisation approach (BLA), which releases the requirement for the ET-customised digital predistortion (DPD) techniques. The proposed BLA is verified through the comparative study on a Gallium Nitride (GaN) PA with ET and a 28V supply voltage. A two-tone signal and a 20MHz modulated signal are used in the measurement, which demonstrates that in contrast to the 28 V case, the ET PA using BLA can simultaneously achieve higher efficiency and better linearity. To investigate the linearity improvement of using BLA, the constellation diagrams, AM/AM and AM/PM characteristics with and without generalized memory polynomial (GMP)-based DPD are measured and analysed.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Date Type: | Published Online |
| Status: | Published |
| Schools: | Engineering |
| Publisher: | IEEE |
| ISBN: | 9781728126456 |
| Last Modified: | 25 Jul 2024 13:15 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/132471 |
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