A 39 W Fully Digital Wideband Inverted Doherty Transmitter

Robert Bootsman; Yiyu Shen; Dieuwert Mul; Mohadig  Rousstia; Rob  Heeres; Fred van Rijs; John Gajadharsing; Morteza S. Alavi; Leo C.N. de Vreede

doi:10.1109/IMS37962.2022.9865405

A 39 W Fully Digital Wideband Inverted Doherty Transmitter

Robert Bootsman, Yiyu Shen, Dieuwert Mul, Mohadig Rousstia, Rob Heeres, Fred van Rijs, John Gajadharsing, Morteza S. Alavi, Leo C.N. de Vreede

Electronics

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

3 Citations (Scopus)

64 Downloads (Pure)

Abstract

A high-power fully-digital Doherty transmitter (DDTX) is proposed. It features two segmented LDMOS output switch banks implemented in a custom V T -down-shifted LDMOS technology. A 40 nm CMOS controller digitally activates the individual LDMOS gate segments of the output stage at RF speed. An inverted Doherty power combiner is proposed that features non-short circuited 2 nd harmonic conditions for the main and peak switch banks to boost the RF bandwidth. To guarantee smooth output power and efficiency vs. frequency, a 2 nd harmonic trap is introduced in the power combiner, yielding an RF bandwidth of > 400 MHz. The realized demonstrator can achieve over 39 W peak output power. Its highest drain and system efficiencies, respectively 60 % and 57 %, were found at 34.2 W of output power, while in power back-off its peak drain and system efficiencies are 52 % and 48 % respectively. Over a 25 dB output range, the system efficiency is within 4 percent points of the drain efficiency.

Original language	English
Title of host publication	Proceedings of the 2022 IEEE/MTT-S International Microwave Symposium - IMS 2022
Place of Publication	Denver, CO
Publisher	IEEE
Pages	979-982
Number of pages	4
ISBN (Electronic)	978-1-6654-9613-1
ISBN (Print)	978-1-6654-9614-8
DOIs	https://doi.org/10.1109/IMS37962.2022.9865405
Publication status	Published - 2022
Event	2022 IEEE/MTT-S International Microwave Symposium - Denver, United States Duration: 19 Jun 2022 → 24 Jun 2022

Publication series

Name	IEEE MTT-S International Microwave Symposium Digest
Volume	2022-June
ISSN (Print)	0149-645X

Conference

Conference	2022 IEEE/MTT-S International Microwave Symposium
Country/Territory	United States
City	Denver
Period	19/06/22 → 24/06/22

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

digital transmitters
LDMOS
CMOS
inverted Doherty
wideband

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1109/IMS37962.2022.9865405

A_39_W_Fully_Digital_Wideband_Inverted_Doherty_TransmitterFinal published version, 1.38 MB

Cite this

Bootsman, R., Shen, Y., Mul, D., Rousstia, M., Heeres, R., van Rijs, F., Gajadharsing, J., Alavi, M. S., & de Vreede, L. C. N. (2022). A 39 W Fully Digital Wideband Inverted Doherty Transmitter. In Proceedings of the 2022 IEEE/MTT-S International Microwave Symposium - IMS 2022 (pp. 979-982). (IEEE MTT-S International Microwave Symposium Digest; Vol. 2022-June). IEEE. https://doi.org/10.1109/IMS37962.2022.9865405

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abstract = "A high-power fully-digital Doherty transmitter (DDTX) is proposed. It features two segmented LDMOS output switch banks implemented in a custom V T -down-shifted LDMOS technology. A 40 nm CMOS controller digitally activates the individual LDMOS gate segments of the output stage at RF speed. An inverted Doherty power combiner is proposed that features non-short circuited 2 nd harmonic conditions for the main and peak switch banks to boost the RF bandwidth. To guarantee smooth output power and efficiency vs. frequency, a 2 nd harmonic trap is introduced in the power combiner, yielding an RF bandwidth of > 400 MHz. The realized demonstrator can achieve over 39 W peak output power. Its highest drain and system efficiencies, respectively 60 % and 57 %, were found at 34.2 W of output power, while in power back-off its peak drain and system efficiencies are 52 % and 48 % respectively. Over a 25 dB output range, the system efficiency is within 4 percent points of the drain efficiency.",

keywords = "digital transmitters, LDMOS, CMOS, inverted Doherty, wideband",

author = "Robert Bootsman and Yiyu Shen and Dieuwert Mul and Mohadig Rousstia and Rob Heeres and {van Rijs}, Fred and John Gajadharsing and Alavi, {Morteza S.} and {de Vreede}, {Leo C.N.}",

note = "Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.; 2022 IEEE/MTT-S<br/>International Microwave Symposium ; Conference date: 19-06-2022 Through 24-06-2022",

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doi = "10.1109/IMS37962.2022.9865405",

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Bootsman, R , Shen, Y , Mul, D, Rousstia, M, Heeres, R, van Rijs, F, Gajadharsing, J, Alavi, MS & de Vreede, LCN 2022, A 39 W Fully Digital Wideband Inverted Doherty Transmitter. in Proceedings of the 2022 IEEE/MTT-S International Microwave Symposium - IMS 2022. IEEE MTT-S International Microwave Symposium Digest, vol. 2022-June, IEEE, Denver, CO, pp. 979-982, 2022 IEEE/MTT-S
International Microwave Symposium, Denver, United States, 19/06/22. https://doi.org/10.1109/IMS37962.2022.9865405

A 39 W Fully Digital Wideband Inverted Doherty Transmitter. / Bootsman, Robert ; Shen, Yiyu ; Mul, Dieuwert et al.
Proceedings of the 2022 IEEE/MTT-S International Microwave Symposium - IMS 2022. Denver, CO: IEEE, 2022. p. 979-982 (IEEE MTT-S International Microwave Symposium Digest; Vol. 2022-June).

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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AU - Bootsman, Robert

AU - Shen, Yiyu

AU - Mul, Dieuwert

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AU - Gajadharsing, John

AU - Alavi, Morteza S.

AU - de Vreede, Leo C.N.

N1 - Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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N2 - A high-power fully-digital Doherty transmitter (DDTX) is proposed. It features two segmented LDMOS output switch banks implemented in a custom V T -down-shifted LDMOS technology. A 40 nm CMOS controller digitally activates the individual LDMOS gate segments of the output stage at RF speed. An inverted Doherty power combiner is proposed that features non-short circuited 2 nd harmonic conditions for the main and peak switch banks to boost the RF bandwidth. To guarantee smooth output power and efficiency vs. frequency, a 2 nd harmonic trap is introduced in the power combiner, yielding an RF bandwidth of > 400 MHz. The realized demonstrator can achieve over 39 W peak output power. Its highest drain and system efficiencies, respectively 60 % and 57 %, were found at 34.2 W of output power, while in power back-off its peak drain and system efficiencies are 52 % and 48 % respectively. Over a 25 dB output range, the system efficiency is within 4 percent points of the drain efficiency.

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A 39 W Fully Digital Wideband Inverted Doherty Transmitter

Abstract

Publication series

Conference

Bibliographical note

Keywords

UN SDGs

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