A compact wideband crossover coupler with lumped elements

Kwangwon Park, Hyunkyu Lee, Iljin Lee, In Woong Kang, Sanggeun Jeon

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


A compact wideband crossover coupler with fully lumped elements is presented. To achieve a wideband operation, a three-section branch-line structure is employed for the crossover coupler. The size is significantly minimized by replacing transmission lines with lumped elements. The measurement shows that the insertion loss, isolation, and return loss are 1.7 dB, 24 dB, and 14.5 dB, respectively, at 2 GHz. The fractional bandwidth of 20-dB isolation and 3-dB insertion loss is 27%. The size of the crossover coupler is 11 mm × 9 mm, which corresponds to 0.07λ × 0.06λ at 2 GHz. This is significantly smaller than a conventional three-section branch-line crossover coupler by 95%.

Original languageEnglish
Pages (from-to)96-100
Number of pages5
JournalJournal of Electromagnetic Engineering and Science
Issue number2
Publication statusPublished - 2019


  • Butler Matrix
  • Crossover Coupler
  • Lumped Elements
  • Planar Circuits

ASJC Scopus subject areas

  • Radiation
  • Instrumentation
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


Dive into the research topics of 'A compact wideband crossover coupler with lumped elements'. Together they form a unique fingerprint.

Cite this