Mixed-coupling multi-function quint-wideband asymmetric stepped impedance resonator filter

Yasir I.A. Al-Yasir, Yuxiang Tu, Naser Ojaroudi Parchin, I. T.E. Elfergani, Raed A. Abd-Alhameed*, Jonathan Rodriguez, James M. Noras

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


A new mixed-coupled quint-wideband ASIR bandpass filter with low insertion loss and compact size is proposed: spiral and open-loop coupled structures realize fundamental mode coupling and enhance another four spurious modes with optimum insertion loss. The fundamental frequency and four spurious frequencies are located at 1.275 GHz with fractional bandwidth (FBW) of 38.4%, 3.225 GHz with FBW of 38.4%, 5.875 GHz with FBW of 12.1%, 7.515 GHz with FBW of 13.7%, 9.74 GHz with FBW of 4.3%. The filter is suitable for multiple applications including GPS, Wi-Fi and IEEE 802.11a, and partially for IEEE 802.16. The quint-wideband filter has a performance superior to its currently proposed quint-wideband counterparts.

Original languageEnglish
Pages (from-to)1181-1184
Number of pages4
JournalMicrowave and Optical Technology Letters
Issue number5
Early online date21 Jan 2019
Publication statusPublished - May 2019
Externally publishedYes


  • BPF
  • microstrip filter
  • quint-wideband
  • stepped impedance resonator


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