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access icon free Dual-band bandpass filter based on CPW series-connected resonators

  • Author(s): L. Al-Khateeb 1  and  O. Abu Safia 2
    • View affiliations
    • Affiliations: 1: Telecommunication Engineering Department, Yarmouk University, Irbid 21163, Jordan;
      2: Electrical Engineering Department, University of Quebec in Outaouais, Gatineau, Quebec J8Y 3G5, Canada
  • Source: Volume 49, Issue 12, 06 June 2013, p. 761 – 762
    DOI:  10.1049/el.2013.1407 , Print ISSN 0013-5194, Online ISSN 1350-911X
© The Institution of Engineering and Technology
Received 26/04/2013, Published

A new design of a three-pole dual-band bandpass filter using coplanar waveguide (CPW) series-connected resonators and impedance inverters is proposed. The circuit conversions that lead to the lumped element model of the proposed filter are introduced. The resonators of the filter are implemented using special compact series-connected resonators patterned in the centre conductor of a CPW transmission line. The filter operates at the two centre band frequencies 1.8 and 2.4 GHz. Hence, it is considered an excellent candidate for GSM/Wi-Fi applications. Experimental results show very good agreement with simulated results, which validates the proposed filter.

Inspec keywords: band-pass filters; coplanar waveguides; resonator filters; conductors (electric); UHF resonators; UHF filters

Other keywords: GSM-Wi-Fi applications; CPW transmission line; frequency 1.8 GHz; impedance inverters; circuit conversions; lumped element model; centre conductor; CPW series-connected resonators; three-pole dual-band bandpass filter; coplanar waveguide series-connected resonators; frequency 2.4 GHz

Subjects: Conductors; Passive filters and other passive networks; Waveguide and microwave transmission line components; Waveguides and microwave transmission lines

References

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      • 2. Tseng, C.-H., Itoh, T.: ‘Dual-band bandpass and bandstop filters using composite right/left-handed metamaterial transmission lines’. IEEE MTT-S International, San Fransisco, CA, USA, June 2006, pp. 931–934.
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      • 3. Mao, S.-G., Chuen, Y.-Z., Wu, M.-S.: ‘Asymmetric dual-passband coplanar waveguide filters using periodic composite right/left-handed and quarter-wavelength stubs’, IEEE Microw. Wirel. Compon. Lett., 2007, 17, (6), pp. 418–420 (doi: 10.1109/LMWC.2007.897787).
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      • 6. Hettak, K., Dib, N., Sheta, A., Toutain, S.: ‘A class of novel uniplanar series resonators and their implementation in original applications’, IEEE Trans. Microw. Theory Tech., 1998, 46, (9), pp. 1270–1276 (doi: 10.1109/22.709469).
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      • 7. Zeland Software, Inc.: ‘IE3D Simulator’ (Fremont, CA, 2007).
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      • 4. Satoh, K., Takagi, Y., Narahashi, S.: ‘New CPW quarter-wavelength resonator with open stubs for multipole dual-band bandpass filter’. Microwave Conf. EuMC, Amsterdam, October 2008, pp. 365–368.
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