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Simplified analysis of the effect of load variation in common Doherty power amplifier architectures

Quaglia, Roberto and Lees, Jonathan 2019. Simplified analysis of the effect of load variation in common Doherty power amplifier architectures. Presented at: 2019 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR), Orlando, FL, USA, 20-23 Jan 2019. IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE,

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Abstract

This paper describes the effect of load variation on Doherty power amplifier performance. A simplified analysis that considers three common Doherty amplifier architectures allows the evaluation of how load variation translates into variation of load at the devices' current generator plane. Under the assumption that system counter-measures are used to avoid drain voltage clipping, the average efficiency and power are evaluated and compared among the different architectures. While, at the centre design frequency, similar results can be observed, it can be seen that an intrinsically broadband design leads to better average power and efficiency over frequency vs. load variation.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: IEEE
ISBN: 9781538659489
Date of First Compliant Deposit: 24 July 2019
Date of Acceptance: 24 September 2018
Last Modified: 30 Nov 2019 06:06
URI: http://orca.cf.ac.uk/id/eprint/123756

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