Wideband BPF using quadruple-mode ring resonator loaded with short-circuited stubs and Γ-shaped band-stop sections

Salman Arain*, Photos Vryonides, M. Ali Babar Abbasi, Abdul Quddious, Marco A. Antoniades, Symeon Nikolaou

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this letter, a compact, wideband bandpass filter with 31% 3-dB bandwidth, with very sharp roll-off characteristics, low insertion loss of 0.45 dB, high return loss greater than 25 dB, and improved out-of-band performance, suitable for 2.4 GHz WLAN applications is presented. The developed prototype filter is based on a quadruple-mode square ring resonator, connected to two λg/2 short-circuited stubs. In order to improve the out-of-band performance and achieve a wider stopband response, two Γ-shaped band-stop sections are connected on the feeding lines without disturbing the geometric symmetry along the diagonal. Measurements of the fabricated prototype provide experimental verification of the theoretical and simulated behaviour of the proposed filter.

Original languageEnglish
Pages (from-to)2316-2320
JournalMicrowave and Optical Technology Letters
Volume59
Issue number9
DOIs
Publication statusPublished - 27 Jun 2017
Externally publishedYes

Keywords

  • bandpass filter (BPF)
  • passive filter
  • quadruple
  • ring resonator
  • wideband

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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