UWB bandpass filter using microstrip-to-CPW transition with broadband balun

Jung Woo Baik, Tae Hak Lee, Young Sik Kim

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


A novel ultra-wideband bandpass filter (BPF) is presented using a back-to-back microstrip-to-coplanar waveguide (CPW) transition employed as the broadband balun structure in this letter. The proposed BPF is based on the electromagnetic coupling between open-circuited microstrip line and short-circuited CPW. The equivalent circuit of half of the filter is used to calculate the input impedance. The broadband microstip-to-CPW transition is designed at the center frequency of 6.85 GHz. The simulated and measured results are shown in this letter.

Original languageEnglish
Pages (from-to)846-848
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number12
Publication statusPublished - 2007 Dec


  • Bandpass filter (BPF)
  • Broadband balun
  • Microstrip-to-coplanar waveguide (CPW)
  • Transition
  • Ultra-wideband (UWB)

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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