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Design of a low-loss microstrip diplexer with a compact size based on coupled meandrous open-loop resonators

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Abstract

In this paper, we have designed and fabricated a novel microstrip diplexer. It has two quite close channels at 1.67 GHz and 1.88 GHz make it suitable for FDD schemes and GSM applications. The proposed structure includes two coupled meandrous open loop resonators which are coupled to spiral cells. An approximated LC model of the presented resonator is proposed and analyzed to give some information about the resonator behavior. Based on the obtained information, the proposed diplexer is optimized and miniaturized. It occupies a small size of 0.036 λg2. Despite of having close channels, the low insertion losses of 0.43 dB and 0.35 dB are obtained for the first and second bands, respectively. For verifying the simulation results and designing method, the diplexer is fabricated and measured, where the measurement and simulation results show a good agreement.

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Authors and Affiliations

  1. Department of Electrical Engineering, Kermanshah University of Technology, Kermanshah, Iran

    Abbas Rezaei

  2. Department of Software Engineering, Faculty of Engineering, Koya University, Koya KOY45, Kurdistan Region, Iraq

    Salah I. Yahya

  3. Department of Communication and Computer Engineering, Cihan University-Erbil, Kurdistan Region, Iraq

    Salah I. Yahya

  4. Institute of Research and Development, Duy Tan University, Da Nang, 550000, Vietnam

    Leila Nouri

  5. Faculty of Electrical and Electronics Engineering, Duy Tan University, Da Nang, 550000, Vietnam

    Leila Nouri

  6. Wireless Communication Centre, School of Electrical Engineering, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia

    Mohd H. Jamaluddin

Authors
  1. Abbas Rezaei
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  2. Salah I. Yahya
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  3. Leila Nouri
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  4. Mohd H. Jamaluddin
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Correspondence to Abbas Rezaei.

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Rezaei, A., Yahya, S.I., Nouri, L. et al. Design of a low-loss microstrip diplexer with a compact size based on coupled meandrous open-loop resonators. Analog Integr Circ Sig Process 102, 579–584 (2020). https://doi.org/10.1007/s10470-020-01625-w

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  • DOI: https://doi.org/10.1007/s10470-020-01625-w

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