Balanced BPF design of substrate-integrated waveguide cavity using hybrid microstrip/slot feed for CM suppression

Meng Yu Chen, Wanchu Hong, Min-Hua Ho

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A dual-mode balanced bandpass filter (BPF) design with an excellent common-mode (CM) rejection performance is presented. The balanced filter is composed of coupled substrate-integrated waveguide (SIW) cavities and a hybrid microstrip/slot feed. The cavities are of a square shape to produce two degenerated resonance modes, TE102 and TE201, for dual-mode operation. The hybrid microstrip/slot feed is developed to suppress the unwanted CM signals in both the inband and out-band regions. The measured CM signal rejection levels are over 50 dB. A experiment was conducted to verify this novel balanced BPF design.

Original languageEnglish
Pages (from-to)1533-1534
Number of pages2
JournalElectronics Letters
Issue number21
Publication statusPublished - 2014 Jan 1


All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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