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Miniaturized Half-Mode Slow-Wave Substrate-Integrated Waveguide Bandpass Filter

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Abstract

In this paper, a miniaturized substrate integrated waveguide (SIW) band-pass cavity filter is presented. Miniaturization is achieved using the half-mode (HM) principle so the lateral dimension of the filter can be reduced by half. Moreover, the slow-wave (SW) technique is used to decrease the center frequency by more than \(30\%\). Combining these two techniques will reduce filter dimensions by more than \(75\%\) in comparison with the original SIW. By using an electromagnetic (EM) solver the effect of each geometrical parameter on the filter performance is demonstrated. Measurements on the fabricated filter are in good agreement with the numerical results. Input return loss is better than 10 dB, insertion loss of the filter is lower than 2.5 dB across a bandwidth of 3.3 GHz.

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Acknowledgements

The authors express their gratitude to M. Hassanein Rabah, with the LEOST/COSYS-IFSTTAR, Lille, France, for his technical assistance in fabricating the experimental prototypes. The authors are grateful to Prof. Mahmoud Shahabadi University of Tehran, Iran, for his helpful comments and assistance.

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Authors and Affiliations

  1. Physics Department, Lebanese University, Beirut, Lebanon

    Mohamad Khalil & Jalal Jomaah

  2. Department of Electrical and Computer Engineering, University of Tehran, Tehran, Iran

    Mohamad Khalil & Mahmoud Kamarei

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  1. Mohamad Khalil
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  2. Mahmoud Kamarei
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  3. Jalal Jomaah
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Correspondence to Mohamad Khalil.

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Khalil, M., Kamarei, M. & Jomaah, J. Miniaturized Half-Mode Slow-Wave Substrate-Integrated Waveguide Bandpass Filter. Wireless Pers Commun 107, 283–290 (2019). https://doi.org/10.1007/s11277-019-06254-9

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  • DOI: https://doi.org/10.1007/s11277-019-06254-9

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