Hybrid Spoof Surface Plasmon Polariton and Substrate Integrated Waveguide Transmission Line and Its Application in Filter

In this paper, spoof surface plasmon polariton (SPP) is integrated in the closed substrate integrated waveguide (SIW) structure and a novel hybrid SIW-SPP guided-wave transmission line (TL) is proposed. In this design, the surface wave mode of SPP can be excited and transmitted inside the closed str...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2017-12, Vol.65 (12), p.4925-4932
Main Authors: Guan, Dong-Fang, You, Peng, Zhang, Qingfeng, Xiao, Ke, Yong, Shao-Wei
Format: Article
Language:English
Subjects:
Bandpass filter (BPF)
Bandpass filters
Bandwidths
Broadband
Cutoff frequency
Dispersion
Optical surface waves
Plasmons
Polaritons
Propagation losses
substrate integrated waveguide (SIW)
Substrate integrated waveguides
Substrates
surface plasmon polariton (SPP)
Surface waves
Wave dispersion
wideband
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Summary:In this paper, spoof surface plasmon polariton (SPP) is integrated in the closed substrate integrated waveguide (SIW) structure and a novel hybrid SIW-SPP guided-wave transmission line (TL) is proposed. In this design, the surface wave mode of SPP can be excited and transmitted inside the closed structure of SIW. The dispersion property of the proposed SIW-SPP hybrid structure indicates that it has both slow wave feature of SPP and fast-wave feature of SIW. With the low-pass feature of SSP and the high-pass feature of SIW, the proposed hybrid SIW-SPP TL becomes a bandpass filter (BPF) naturally. The concept of integrating SPP and SIW opens a new way to develop novel wideband BPFs. A broadband filter is fabricated to verify the theory and the measured passband is from 16.1 to 25.4 GHz with a relative bandwidth of 43.8%. The filter bandwidth can be easily controlled by tuning parameters, thus the proposed structure is attractive and useful for the design of various BPFs.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2017.2727486