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Wideband Four-Way Filtering Power Divider Based on Hybrid Spoof Surface Plasmon Polariton and Substrate Integrated Waveguide

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Abstract

In this paper, a four-way filtering power divider (FPD) based on hybrid spoof surface plasmon polariton (SSPP) and substrate integrated waveguide (SIW) is designed and fabricated. It is for the first time that a four-way FPD has been implemented by integrating SIW and SSPP structures. This combination can guarantee a wide bandwidth which would not be attainable by employing merely SIW or SSPP. The presented hybrid structure has been realized by etching some butterfly grooves on the upper metal surface of SIW and half-mode SIW. The lower and upper cutoff frequencies of this hybrid SIW-SSPP FPD can be adjusted independently by tuning the dimensions of SIW and SSPP unites, respectively. Employing butterfly-shaped SSPPs instead of typical rectangular SSPPs with the same length leads to a reduction in the circuit’s size, higher slow-wave effects, and shorter wavelength. To validate the proposed design procedure, the presented FPD is fabricated and measured. A good agreement between the simulated and measured results is achieved. What stands out from the measured results is that the proposed circuit achieves a 3-dB fractional bandwidth of 38% from 4.2 to 6.2 GHz, a return loss of higher than 13.5 dB, and a minimum insertion loss of 0.7 dB.

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The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.

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Authors and Affiliations

  1. Microwave & Millimeter Wave Research Group, Department of Electrical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran

    Fahimeh Tavakoli & Ali-Reza Moznebi

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  1. Fahimeh Tavakoli
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  2. Ali-Reza Moznebi
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Contributions

F. Tavakoli and A.-R. Moznebi contributed to the design and implementation of the research, to the analysis of the results and to the writing of the manuscript.

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Correspondence to Ali-Reza Moznebi.

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Tavakoli, F., Moznebi, AR. Wideband Four-Way Filtering Power Divider Based on Hybrid Spoof Surface Plasmon Polariton and Substrate Integrated Waveguide. Plasmonics (2024). https://doi.org/10.1007/s11468-024-02326-0

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