Balanced and unbalanced diplexers design using substrate integrated waveguide cavities

Min Hua Ho, Muhammad Mimsyad, Geng Gui Chang, Yi Hao Hong, Jen Chih Li, Chung I.G. Hsu

Research output: Contribution to journalArticle

Abstract

The contribution of this article is to propose a balanced and unbalanced diplexers design using substrate integrated waveguide cavities (SIWCs). The employed SIWCs are square cavities which support two co-frequency degenerate modes. A row of via-holes is introduced inside the cavity to split the degenerate modes’ co-frequency resonances into two frequency-distinct ones, thus creating two duplexing bands with an auxiliary signal filtering effect. The fabricated diplexers performed quite well with measured and simulated results being in good agreement. The measured isolations between the two duplexing ports are more than 40 dB. Furthermore, the balanced SIWC diplexer has its measured common-mode rejection levels >42 dB, and the measured common-mode isolations between the two duplexing ports are >53 dB.

Original languageEnglish
Pages (from-to)1590-1594
Number of pages5
JournalMicrowave and Optical Technology Letters
Volume60
Issue number7
DOIs
Publication statusPublished - 2018 Jul

All Science Journal Classification (ASJC) codes

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

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