A triband bandpass filter with low loss and high band selectivity using the split-end asymmetric stepped impedance resonators

Min Hang Weng, Shoou Jinn Chang, Wei Yu Chen, Siang Wen Lan, Cheng Yuan Hung, Yi Hsin Su, Kuan Hon

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In this article, a triband bandpass filter for the applications of global system for mobile communications at 1.8 GHz, WiMAX at 3.5 GHz, and WLAN at 5.2 GHz with low insertion loss and high selectivity is presented. First, the triband passband responses are designed by tuning the length ratio (u) and impedance ratio (R) of asymmetric stepped impedance resonators (SIRs). Second, the band performances are improved by carefully arranging the coupling structure of the SIR. In this design, the split-end asymmetric SIRs are used to provide desired triband performances. Due to the four transmission zeros near the passband edge, the band selectivity of the proposed filter is much improved. The filter was fabricated and the measured results have a good agreement with the full-wave simulated results. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1427-1430, 2014

Original languageEnglish
Pages (from-to)1427-1430
Number of pages4
JournalMicrowave and Optical Technology Letters
Volume56
Issue number6
DOIs
Publication statusPublished - 2014 Jun

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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