Miniaturized size branch line coupler using open stubs with high-low impedances

M. Y.O. Elhiwaris, S. K.A. Rahim, U. A.K. Okonkwo, N. M. Jizat, M. F. Jamlos

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


In this paper, a miniaturized branch-line coupler is proposed. The topology of the circuit is designed using novel design of T-model approach with open stubs with high-low impedances, which provides necessary bandwidth for WLAN band at 2.45 GHz. The miniaturized branch-line coupler is designed and fabricated with a low-cost FR4 substrate as a platform in producing significantly reduction by more than 64.21% compared to the conventional coupler on inexpensive board. Furthermore, the coupler can equally divide the input signal with 90° phase of difference while maintaining the initial power from the source.

Original languageEnglish
Pages (from-to)65-74
Number of pages10
JournalProgress In Electromagnetics Research Letters
Publication statusPublished - 2011
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials


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