Design of Miniaturized SIW Filter Loaded with Open-Loop Resonators and its Application to Diplexer

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dc.contributor.authorBarik, Rusan Kumar
dc.contributor.authorCheng, Qingsha S.
dc.contributor.authorPradhan, Nrusingha Charan
dc.contributor.authorKarthikeyan, Sholampettai Submaranian
dc.date.accessioned2026-11-02T05:24:30Z
dc.date.available2026-11-02T05:24:30Z
dc.date.issued2020-09-01
dc.description.abstractThis paper presents a novel design of miniaturized substrate-integrated waveguide (SIW) filter loaded with a pair of unit-cell resonators. Two identical open-loop resonators are connected face-to-face to form a unit-cell. A pair of unit-cells is engraved on the surface of the SIW to develop an evanescent-mode bandpass filter. The proposed unit-cells behave as an electric-dipole and produce a passband smaller than the waveguide frequency. This reduction in resonant frequency allows us to achieve size miniaturization. An equivalent electrical-circuit model is developed and investigate for characterization of passband and transmission-zero. This filter structure is then employed to develop a SIW planar diplexer. Two SIW filter structures loaded with unit-cells are excited with a T-shaped feed line to achieve lower and upper channels of the diplexer. To demonstrate the analysis, both SIW filter and diplexer loaded with open-loop resonators are implemented and fabricated. The proposed SIW filter and diplexer prototypes exhibit size miniaturization, low insertion-loss and high-selectivity due to evanescent-mode transmission and sub-wavelength resonators. The measurement responses are very similar to the simulation responses.
dc.identifier.issn12102512
dc.identifier.urihttps://doi.org/10.13164/re.2020.0609
dc.identifier.urihttp://nitt.ndl.gov.in/handle/123456789/387
dc.language.isoen
dc.publisherCzech Technical University
dc.relation.ispartofseriesRadioengineering; Vol. 29/ No. 4
dc.titleDesign of Miniaturized SIW Filter Loaded with Open-Loop Resonators and its Application to Diplexer
dc.typeArticle
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