Spoof surface plasmonic waveguide and its band-rejection filter based on H-shaped slot units

Publication Type:
Journal Article
Journal of Physics D: Applied Physics, 2019, 52 (36)
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Li_2019_J._Phys._D__Appl._Phys._52_365303.pdfPublished Version1.89 MB
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© 2019 IOP Publishing Ltd. To reduce the transverse width of the SSPP (spoof surface plasmon polaritons) waveguide, the complementary structure of the SSPP waveguide based on the H-shaped conductor periodic unit is used. In this structure, periodic H-shaped slots are cut in the conductor film on the substrate interface. Fed by the coplanar waveguide with flared ground planes, this SSPP waveguide with a small width can achieve broadband transmission characteristics below 10 GHz. Inserting small H-shaped conductor units inside the slot can form the complementary split ring resonators, and the band-stop filter is realized without increasing the lateral dimension of the original SSPP waveguide. The experimental results show that the notch frequency of the proposed filter can be effectively regulated by the height of embedded H-shaped conductor units.
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