2.6-GHz Integrated LDMOS Doherty Power Amplifier for 5G Basestation Applications

Maruf Ahmed, Xavier Hue, Margaret Szymanowski, Ricardo Uscola, Joseph Staudinger, Jennifer Kitchen

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


This letter presents a compact output combining network for a packaged integrated asymmetric Doherty Power Amplifier (DPA). The combining network uses a new method for absorbing part of the peaking amplifier’s Cds into the impedance transformer, thus extending the C-L-C based “Cds absorption" technique to asymmetric DPAs. Based on the proposed combining network, a two-stage LDMOS integrated asymmetric DPA was designed and fabricated at 2.6 GHz. The fabricated IC is mounted in a quad flat no-lead (QFN) package. Under a single-tone continuous-wave (CW) signal at 2.6 GHz, the DPA achieves peak power of 46 dBm, linear gain of 31.7 dB and 48% power-added efficiency (PAE) at 8 dB output power back-off (OBO). The DPA also demonstrates good linearizability by meeting the 5G spectrum mask and achieving a DPD corrected ACPR better than -51dBc for 160 MHz long term evolution (LTE).

Original languageEnglish (US)
JournalIEEE Microwave and Wireless Components Letters
StateAccepted/In press - 2021


  • Doherty Power Amplifier (DPA)
  • Gain
  • Impedance
  • Inverters
  • Logic gates
  • Long Term Evolution
  • Optimized production technology
  • Power generation
  • RFIC
  • integrated Doherty
  • long term evolution (LTE)

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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