A Wideband Two-Way Digital Doherty Transmitter in 40nm CMOS

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Abstract

A 40nm CMOS wideband digital Cartesian push-pull inverted Doherty operating in class-E is presented. Wideband Doherty operation is achieved over a 1.9-to-3GHz frequency band, using an off-chip power combining network. The fully digital transmitter (DTX) provides 25.3dBm peak power with a drain/DTX line-up efficiency (DE/SE) of 58.7%/44.9%, respectively, at 2.4GHz. When operated with a 160MHz 256-QAM OFDM signal, it achieves 46.1%/32.7% average DE/SE, with an ACLR and EVM better than −40.6dBc and −33.9dB, respectively, using a simple memory-less digital pre-distortion (DPD).
Original languageEnglish
Title of host publicationProceedings of the 2022 IEEE/MTT-S International Microwave Symposium - IMS 2022
Place of PublicationDanvers
PublisherIEEE
Pages975-978
Number of pages4
ISBN (Electronic)978-1-6654-9613-1
ISBN (Print)978-1-6654-9614-8
DOIs
Publication statusPublished - 2022
Event2022 IEEE/MTT-S
International Microwave Symposium
- Denver, United States
Duration: 19 Jun 202224 Jun 2022

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
Volume2022-June
ISSN (Print)0149-645X

Conference

Conference2022 IEEE/MTT-S
International Microwave Symposium
Country/TerritoryUnited States
CityDenver
Period19/06/2224/06/22

Keywords

  • Cartesian, class-E
  • Doherty
  • efficient
  • wideband
  • digital power amplifier
  • RF-DAC
  • DPD
  • DTX
  • Balun
  • CMOS

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