A new type of millimeter wave-integrated directional couplers

Sifan Li, Aosheng Rong

Research output: Contribution to journalArticlepeer-review


In this paper a new type of millimeter wave integrated directional coupler is proposed. The coupling mechanism on the narrow wall of waveguide consists of a series of bilateral E-plane slots deposited on a dielectric substrate by photo-etching technique. The modified generalized transmission parameters considering the thickness effects of the strips and higher order mode interactions at the step discontinuities in the coupling region are used in optimizing program. The calculated performance of a 3-dB 12-slot directional coupler at Ka-band is given. A prototype Ka-band coupler has been tested. The measured results agree with the theoretical prediction satisfactorily.

Original languageEnglish (US)
Pages (from-to)949-962
Number of pages14
JournalInternational Journal of Infrared and Millimeter Waves
Issue number8
StatePublished - Aug 1989
Externally publishedYes

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Electrical and Electronic Engineering


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