Miniaturized bandpass filter design using substrate integrated waveguide cavities with enhanced signal selectivity

Min-Hua Ho, Keh Yi Lee, Yi Cheng Chen

Research output: Contribution to journalArticle


We propose a miniaturized bandpass filter (BPF) design with enhanced signal selectivity performance. The proposed structure is composed of four square substrate integrated waveguide cavities (SIWCs). To miniaturize its circuit size, the applied cavities are under the evanescent mode resonance which is accomplished by loaded itself with a large capacitance. As a result, a 93.4% size reduction is achieved. The negative coupling structure is employed in the filter design to create two transmission zeroes by the pass band's two edges for enhancing the signal selectivity. Experiment is conducted to verify this compact SIWC BPF design.

Original languageEnglish
Pages (from-to)1185-1188
Number of pages4
JournalMicrowave and Optical Technology Letters
Issue number5
Publication statusPublished - 2019 May 1


All Science Journal Classification (ASJC) codes

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

Cite this