Harmonic suppression of bandpass filters using open-circuited stubs

Lih Shan Chen, Wen Jeng Lin, Tsung Hui Huang, Mau Phon Houng, Shen Li Fu

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In this article, a cascaded bandstop filter using quarter-wavelength open-circuited stub structure is employed to suppress the spurious passband at the second harmonic of the bandpass filter. The center frequency of the fabricated bandpass filter is at 0.9 GHz and the fractional bandwidth is 5%. The proposed bandpass filter shows 30 dB rejection at the second harmonic during the frequency range from 1.1 to 10 GHz. The measured frequency responses of the fabricated filter are in agreement with simulated results.

Original languageEnglish
Pages (from-to)863-865
Number of pages3
JournalMicrowave and Optical Technology Letters
Issue number4
Publication statusPublished - 2008 Apr 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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