Asymmetric parallel-coupled lines for notch implementation in UWB filters

Hussein Shaman, Jia Sheng Hong

Research output: Contribution to journalArticlepeer-review

140 Citations (Scopus)


In this letter, a novel microstrip parallel-coupled line structure with two asymmetric loading stubs is proposed for notched band implementation in ultra-wideband (UWB) bandpass filter (BPF). The rejection band is introduced by adding asymmetric loading stubs to the two outer arms of three parallel-coupled lines. The lengths and the widths of the stubs can control the bandwidth of the notched filter and can set the notched band at a desired frequency. This structure has been applied to a single-stage UWB BPF in order to produce a narrow notched band inside its passband. The design is successfully realized in theory and verified by full-wave electromagnetic simulation and the experiment. © 2007 IEEE.

Original languageEnglish
Article number4266849
Pages (from-to)516-518
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number7
Publication statusPublished - Jul 2007


  • Multiple-mode resonator filters
  • Notched filters
  • Parallel-coupled line filters
  • Ultra-wideband (UWB) bandpass filters (BPFs)


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