Miniaturized Broadband Doherty Power Amplifier Using Simplified Output Matching Topology

Chen, H; Xu, JX; Zhang, XY

Miniaturized Broadband Doherty Power Amplifier Using Simplified Output Matching Topology

Chen, H Xu, JX Zhang, XY

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Publisher:: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication Type:: Journal Article
Citation:: IEEE Transactions on Circuits and Systems I: Regular Papers, 2022, 69, (8), pp. 3083-3092
Issue Date:: 2022-08-01

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Field	Value	Language
dc.contributor.author	Chen, H
dc.contributor.author	Xu, JX
dc.contributor.author	Zhang, XY
dc.date.accessioned	2023-04-11T01:41:57Z
dc.date.available	2023-04-11T01:41:57Z
dc.date.issued	2022-08-01
dc.identifier.citation	IEEE Transactions on Circuits and Systems I: Regular Papers, 2022, 69, (8), pp. 3083-3092
dc.identifier.issn	1549-8328
dc.identifier.issn	1558-0806
dc.identifier.uri	http://hdl.handle.net/10453/169479
dc.description.abstract	This paper presents a Doherty power amplifier (DPA) with reduced size and wide bandwidth by using a simplified output matching topology. In broadband DPA designs, post-matching networks are usually added after the combing node, which usually occupy large circuit sizes. However, in this design, the post-matching network is not used. Instead, two ideal transformers and specific output matching components are employed at carrier and peaking branches. Then, by rearranging the output matching components in the two branches, Norton transformation can be used and the ideal transformers can be eliminated. In this way, the impedance at the combining node is directly matched to a 50- Ω load without using a post-matching network, resulting in both compact size and wide bandwidth. For verification, a broadband DPA prototype with a very simple structure is implemented. The fabricated circuit shows a compact size. A wide bandwidth from 1.3 to 2.8 GHz (73%) is achieved with a saturated output power of 41.4-44.6 dBm. The drain efficiencies at saturation and 6-dB back-off power level are 60.1-79.1% and 41.8-61%, respectively, which are comparable to those of state-of-the-art designs.
dc.language	English
dc.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
dc.relation.ispartof	IEEE Transactions on Circuits and Systems I: Regular Papers
dc.relation.isbasedon	10.1109/TCSI.2022.3169883
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering
dc.subject.classification	Electrical & Electronic Engineering
dc.title	Miniaturized Broadband Doherty Power Amplifier Using Simplified Output Matching Topology
dc.type	Journal Article
utslib.citation.volume	69
utslib.for	0906 Electrical and Electronic Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2023-04-11T01:41:56Z
pubs.issue	8
pubs.publication-status	Published
pubs.volume	69
utslib.citation.issue	8

Abstract:

This paper presents a Doherty power amplifier (DPA) with reduced size and wide bandwidth by using a simplified output matching topology. In broadband DPA designs, post-matching networks are usually added after the combing node, which usually occupy large circuit sizes. However, in this design, the post-matching network is not used. Instead, two ideal transformers and specific output matching components are employed at carrier and peaking branches. Then, by rearranging the output matching components in the two branches, Norton transformation can be used and the ideal transformers can be eliminated. In this way, the impedance at the combining node is directly matched to a 50- Ω load without using a post-matching network, resulting in both compact size and wide bandwidth. For verification, a broadband DPA prototype with a very simple structure is implemented. The fabricated circuit shows a compact size. A wide bandwidth from 1.3 to 2.8 GHz (73%) is achieved with a saturated output power of 41.4-44.6 dBm. The drain efficiencies at saturation and 6-dB back-off power level are 60.1-79.1% and 41.8-61%, respectively, which are comparable to those of state-of-the-art designs.

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http://hdl.handle.net/10453/169479