A frequency-reconfigurable mm-Wave power amplifier with active-impedance synthesis in an asymmetrical non-isolated combiner

Chandrakanth Reddy Chappidi, Kaushik Sengupta

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

27 Scopus citations

Abstract

A frequency-agile mm-Wave power amplifier capable of reconfiguring itself to operate near-optimally over a wide range of tunable frequencies, yet producing output power >22dBm with PAE>20%, is useful for a wide range of applications in reconfigurable communication systems supporting multi-Gb/s over large links to hyper-spectral sensing and imaging. While recent works have demonstrated high efficiency in Watt-level mm-Wave power amplifiers [1-5], most of the architectures operate over a limited frequency range, primarily dominated by the bandwidth of the output-matching or combiner networks. A frequency-agile power amplifier, therefore, needs a widely reconfigurable, yet an efficient output network, which is difficult to achieve with on-chip variable passives due to their poor quality factors in silicon IC processes. In this paper, we present an architecture where an optimal impedance at the output of each unit cell is synthesized exploiting their interaction in a non-isolated power-combiner network. By controlling the amplitude and phase of unit cells, close-to-optimal impedances can be synthesized over a wide operating range at mm-Wave frequencies thus enabling frequency agility. The chip is implemented in a 0.13μm SiGe BiCMOS process and achieves Psat>22dBm between 40 and 65GHz and peak PAE>25% between 40 and 60GHz.

Original languageEnglish (US)
Title of host publication2016 IEEE International Solid-State Circuits Conference, ISSCC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages344-345
Number of pages2
ISBN (Electronic)9781467394666
DOIs
StatePublished - Feb 23 2016
Event63rd IEEE International Solid-State Circuits Conference, ISSCC 2016 - San Francisco, United States
Duration: Jan 31 2016Feb 4 2016

Publication series

NameDigest of Technical Papers - IEEE International Solid-State Circuits Conference
Volume59
ISSN (Print)0193-6530

Other

Other63rd IEEE International Solid-State Circuits Conference, ISSCC 2016
CountryUnited States
CitySan Francisco
Period1/31/162/4/16

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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