Distributed active radiator arrays for efficient doubling, filtering, and beam-forming

Dongjin Seo, Kaushik Sengupta, Ali Hajimiri

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


Distributed Active Radiator (DAR) arrays are demonstrated as novel ways of harmonic generation, radiation, and filtration to generate power at frequencies above the cut-off frequency of a technology. As proofs-of-concept, 2x1 and 2x2 arrays of DAR with beam-forming are implemented on PCB, which are designed to oscillate at the fundamental frequency of 1.25GHz, while radiating (circularly-polarized) at the doubling frequency of 2.5GHz. The measured EIRP of 2x1 and 2x2 arrays are 7.46dBm and 12.96dBm, respectively, at 2.5GHz with a DC-to-radiated 2nd harmonic conversion of 0.8%. Almost 40° of beam-steering at 2.5GHz was measured in 2D space for the 2x2 array and more than 15dB suppression of the first and third harmonic compared to the desired second harmonic was measured in the radiated far-field.

Original languageEnglish (US)
Title of host publication2011 IEEE MTT-S International Microwave Symposium, IMS 2011
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781612847566
StatePublished - Jun 1 2011
Externally publishedYes

Publication series

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

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


  • antenna
  • beam steering
  • distributed active radiation
  • doubling
  • mutual locking
  • on-chip radiation
  • phased array


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