Novel inductance-incorporated microstrip coupled-line bandpass filters with two attenuation poles

Chi Hsueh Wang, Yo Shen Lin, Chun Hsiung Chen

Research output: Contribution to journalConference articlepeer-review

39 Scopus citations

Abstract

Novel microstrip coupled-line bandpass filter with good stopband rejection Is proposed. By Introducing an additional shunt inductance to the conventional coupled-line filter, along with the capacitively coupled gap between coupled-line sections, two attenuation poles at upper and lower stopbands may be achieved without increasing the circuit area. The proposed filter exhibits good stopband rejection with no repeated passband at twice the center frequency as compared to the conventional coupled-line filters. Specifically, a microstrip coupled-line bandpass filter centered at 2.4 GHz with 5.4% 3-dB bandwidth and two attenuation poles is implemented.

Original languageEnglish
Pages (from-to)1979-1982
Number of pages4
JournalIEEE MTT-S International Microwave Symposium Digest
Volume3
StatePublished - 2004
Event2004 IEEE MITT-S International Microwave Symposium Digest - Fort Worth, TX, United States
Duration: 6 Jun 200411 Jun 2004

Keywords

  • Attenuation pole
  • Bandpass filters
  • Coupled-line
  • Microstrip

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