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

Author

Chen, Meng-yu ; Wanchu Hong ; Min-Hua Ho

Author_Institution

Grad. Inst. of Commun. Eng., Nat. Changhua Univ. of Educ., Changhua, Taiwan

Volume

50

Issue

21

fYear

2014

fDate

October 9 2014

Firstpage

1533

Lastpage

1534

Abstract

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 in-band 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.

Keywords

band-pass filters; optical waveguide filters; substrate integrated waveguides; TE₁₀₂ modes; TE₂₀₁ modes; balanced BPF design; common-mode rejection performance; common-mode suppression; coupled substrate- integrated waveguide cavities; degenerated resonance modes; dual-mode balanced bandpass filter design; hybrid microstrip/slot feed; substrate-integrated waveguide cavity;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2014.1948

Filename

6926975