A New Approach to Design Differential-Mode Bandpass Filters on SIW Structure

Author

Xin Xu ; Jianpeng Wang ; Lei Zhu

Author_Institution

Ministerial Key Lab. of JGMT, Nanjing Univ. of Sci. & Technol., Nanjing, China

Volume

23

Issue

12

fYear

2013

fDate

Dec. 2013

Firstpage

635

Lastpage

637

Abstract

A new approach to design differential-mode (DM) bandpass filters is proposed and implemented based on the substrate integrated waveguide (SIW) technology. By properly constructing the topologies of SIW resonant cavities, the balanced section of the proposed filter achieves an attractive capacity in simultaneously realizing the desired DM transmission and expected common-mode (CM) suppression in a certain band. In design, the specified DM frequency response is achieved with an equivalent two-port circuit model. To illustrate the possibilities of the new approach, a fourth-order Ku-band prototype is designed and fabricated on a single-layer substrate. Measured results agree well with the predicted counterparts.

Keywords

band-pass filters; equivalent circuits; frequency response; substrate integrated waveguides; two-port networks; waveguide filters; CM suppression; DM bandpass filter; DM transmission; SIW resonant cavity; differential-mode bandpass filter; equivalent two-port circuit model; expected common-mode suppression; fourth-order Ku-band prototype; frequency response; single-layer substrate; substrate integrated waveguide technology; Band-pass filters; Bandpass filters; Cavity resonators; Filtering theory; Microwave filters; Substrates; Wireless communication; Common-mode (CM) suppression; differential-mode (DM) bandpass filter (BPF); substrate integrated waveguide (SIW);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2013.2283859

Filename

6624120