Broadband PA architectures with asymmetrical combining and Stacked PA cells across 50-70 GHz and 64-110 GHz in 250 nm InP

Tushar Sharma, Zheng Liu, Chandrakanth R. Chappidi, Hooman Saeidi, Suresh Venkatesh, Kaushik Sengupta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

High-efficiency and broadband power amplifiers (PAs) are key to enabling the next-generation of millimeter-Wave (mm-Wave) systems and multi-functional communication, sensing and imaging arrays. Due to the low f/fmax, low breakdown voltages and low gain in silicon devices at mm-Wave frequencies, InP HBTs have been promising candidates to enable high-efficiency, high power and broadband transmitter frontends for compact phased and MIMO arrays above 50 GHz. In this paper, we present two broadband PA architectures covering 50-70 GHz, and 64-110 GHz in 250 nm InP HBT process through specially designed asymmetrical power combining architectures with stacked PA cells. The PAs generate more than 20 dBm of peak power in both the bands with peak output collector efficiency (ηout) exceeding 40%, total collector efficiency (η) exceeding 30% and peak power added efficiency (PAE) >23 % for both bands. This work presents one of the highest bandwidth and highest efficiency PAs with peak power greater than 20 dBm.

Original languageEnglish (US)
Title of host publicationIMS 2020 - 2020 IEEE/MTT-S International Microwave Symposium
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages405-408
Number of pages4
ISBN (Electronic)9781728168159
DOIs
StatePublished - Aug 2020
Event2020 IEEE/MTT-S International Microwave Symposium, IMS 2020 - Virtual, Los Angeles, United States
Duration: Aug 4 2020Aug 6 2020

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
Volume2020-August
ISSN (Print)0149-645X

Conference

Conference2020 IEEE/MTT-S International Microwave Symposium, IMS 2020
CountryUnited States
CityVirtual, Los Angeles
Period8/4/208/6/20

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Keywords

  • Arrays
  • Broadband
  • Combining
  • Heterogeneous integration
  • IC
  • InP
  • Millimeter-Wave
  • Power amplifier
  • Transmitter

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