Microstrip filters based on open stubs and SIR for high frequency and ultra-wideband applications

Tahaİmeci, Bilal Tütüncü*, Faruk Bešlija, Lamija Herceg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

This paper includes two new microstrip filter configurations for high frequency and ultra-wideband applications. The first proposed filter is a composition of four parallel open-circuited stubs connected by optimized fractal-structured microstrip line. The filter response is a combination of three passing regions, namely, low pass from 0.1 GHz to 3 GHz, band-pass from 4.5 GHz to 9 GHz, and high pass from 10.5 GHz to 13 GHz, separated by two rejection regions from 3 GHz to 4.5 GHz and 9 GHz to 10.5 GHz. Deep and sharp rejection regions reaching up to -44.6 dB with 40 % fractional bandwidth (FBW) are observed with a good electrical performance. Furthermore, with a comparative table, the advantages of this proposed BSF in terms of FBW, compactness, and insertion loss are compared with recently reported related studies. Secondly, a dual-band band-pass filter implementing a stepped-impedance resonator (SIR) and a modified H-shaped structure is presented. This filter is designed to operate in a low pass region up to 3.58 GHz and a band-pass region from 15.38 to 21.65 GHz, with a wide stopband region between 4.46 and 14.07 GHz. The simulated and measured results are in good agreement. Compared to its peers, the compact size and low price allow for a wide application of these filter configurations, while passing frequencies allow operation in the unlicensed frequency spectrum, which is popular for high-speed communication.

Original languageEnglish
Pages (from-to)212-223
Number of pages12
JournalJournal of Engineering Research (Kuwait)
Volume10
Issue number3
DOIs
Publication statusPublished - Sept 2022
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022 University of Kuwait. All rights reserved.

Keywords

  • Band pass
  • Band stop
  • Microstrip Filter
  • Open stubs
  • SIR

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