Novel T-shaped non-orthogonal dual-mode band-pass filters with two differently structured resonators

C. Y. Kung, C. F. Yang, Y. T. Hsieh, W. C. Chang, Chin-Guo Kuo, C. C. Diao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Novel dual-mode filters with two differently structured resonators were designed on Al2O3 ceramic substrates to achieve pattern minimization and better filter properties. The input/output microstrip lines were arranged in a straight line, making the designed filter easy to connect with other RF circuits. To promote a coupling effect between the input/output microstrip lines and the resonator, two additional coupling stubs were used to form modified T-shaped microstrip coupling lines. In a dual-mode filter, adding a perturbation stub could generate two degenerate modes and increased the bandwidth in the desired passband. To achieve this, the type-A dual-mode filter was designed on a square-ring resonator with two perturbation stubs. For the type-B filter, two open stubs, one perturbation patch, and one meandering loop ring resonator were investigated to achieve the same purpose but with a smaller pattern size than type-A. According to simulated results, the proposed filters with optimized parameters exhibited the wide passbands.

Original languageEnglish
Title of host publicationIntelligent Technologies and Engineering Systems
Pages675-684
Number of pages10
DOIs
Publication statusPublished - 2013 Aug 8
Event2012 1st International Conference on Intelligent Technologies and Engineering Systems, ICITES 2012 - Changhua, Taiwan
Duration: 2012 Dec 132012 Dec 15

Publication series

NameLecture Notes in Electrical Engineering
Volume234 LNEE
ISSN (Print)1876-1100
ISSN (Electronic)1876-1119

Other

Other2012 1st International Conference on Intelligent Technologies and Engineering Systems, ICITES 2012
CountryTaiwan
CityChanghua
Period12/12/1312/12/15

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Keywords

  • AlO
  • Asymmetric bandwidth
  • Dual band
  • Phase difference

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering

Cite this

Kung, C. Y., Yang, C. F., Hsieh, Y. T., Chang, W. C., Kuo, C-G., & Diao, C. C. (2013). Novel T-shaped non-orthogonal dual-mode band-pass filters with two differently structured resonators. In Intelligent Technologies and Engineering Systems (pp. 675-684). (Lecture Notes in Electrical Engineering; Vol. 234 LNEE). https://doi.org/10.1007/978-1-4614-6747-2_78