Broadband coupled-line balun on a defected ground structure

M. Kim

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


A novel microstrip balun topology based on common-mode rejection is introduced. The balun is constructed with a short section of coupled line placed above a defected ground structure. Measurements on a PCB sample indicate a successful conversion from single end to differential mode showing 0.7 dB of insertion loss at 3 GHz along with 1-dB bandwidth that extends from 0.7 to 5.6 GHz.

Original languageEnglish
Pages (from-to)2575-2577
Number of pages3
JournalMicrowave and Optical Technology Letters
Issue number11
Publication statusPublished - 2012 Nov


  • coupled line
  • defected ground structure
  • microstrip balun

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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