Towards generalized Doherty power amplifier design for multiband operation

Ayman Barakat, Mury Thian, Vincent Fusco

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Abstract

This paper presents a new variant of broadband Doherty power amplifier that employs a novel output combiner. A new parameter ∝ is introduced to permit a generalized analysis of the recently reported Parallel Doherty power amplifier (PDPA),and hence offer design flexibility. The circuit prototype of the new DPA fabricated using GaN devices exhibits maximum drain efficiency of 85% at 43-dBm peak power and 63% at 6-dB backoff power (BOP). Measured drain efficiency of >60% at peak power across 500-MHz frequency range and >50% at 6-dB BOP across 480-MHz frequency range were achieved, confirming the  theoretical wideband characteristics of the new DPA.
Original languageEnglish
Number of pages5
Publication statusPublished - Nov 2015
EventInternational Microwave and Optoelectronics Conference (IMOC 2015) - Porto de Galinhas/Pernambuco, Brazil
Duration: 03 Nov 201506 Nov 2015
http://www.imoc2015.com/ (Link to conference details online)

Conference

ConferenceInternational Microwave and Optoelectronics Conference (IMOC 2015)
Country/TerritoryBrazil
CityPorto de Galinhas/Pernambuco
Period03/11/201506/11/2015
Internet address

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