Wideband chebyshev-response bandpass filter by cascading of cascadable 180° hybrid rings

Chun Hsiang Chi*, Chi-Yang Chang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations


A novel wideband bandpass filter using two cascadable 180° hybrid rings is proposed and analyzed. The synthesis mathematics shows that the filter should be a Chebyshev response of order three. Design equations and design curves of this filter are provided. Using these equations and curves, a wideband bandpass filter can be readily realized. A filter with 85% bandwidth and 15-dB passband return loss is designed as an example. This filter is implemented by finite-ground coplanar waveguide on a 15-mil Al2O3 substrate. The experimental results show excellent agreements with the calculated results.

Original languageEnglish
Title of host publication2006 Asia-Pacific Microwave Conference Proceedings, APMC
Number of pages4
StatePublished - 1 Dec 2006
Event2006 Asia-Pacific Microwave Conference, APMC - Yokohama, Japan
Duration: 12 Dec 200615 Dec 2006

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC


Conference2006 Asia-Pacific Microwave Conference, APMC


  • Bandpass filter
  • Finite-ground coplanar waveguide (FGCPW)
  • Phase inverter
  • Reconfigured 180° hybrid ring
  • Wideband filter

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