Design of Wide-Stopband and Dual-Band Filtering Crossovers Based on Mixed Substrate Integrated Waveguide Cavities

Gang Zhang; Xin Zhou; Kai-Da Xu; Jiquan Yang; Xiaohang Sun; Bin Xu; Kam-Weng Tam; Shuai Feng; Wanchun Tang; Jiasheng Hong

doi:10.1109/tmtt.2023.3291757

Design of Wide-Stopband and Dual-Band Filtering Crossovers Based on Mixed Substrate Integrated Waveguide Cavities

Gang Zhang, Xin Zhou, Kai-Da Xu, Jiquan Yang, Xiaohang Sun, Bin Xu, Kam-Weng Tam, Shuai Feng, Wanchun Tang, Jiasheng Hong

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Abstract

This article proposes a new design approach for filtering crossovers featuring wide-stopband and dual-band characteristics based on mixed substrate integrated waveguide (SIW) cavities. The degenerate orthogonal modes in multimode full-mode SIW (FMSIW) square cavities are fully exploited as the cross-unit of dual channels for cross-transmission and good isolation. By developing proper coupling topology between multiple quarter-mode SIW (QMSIW) cavities and the FMSIW cavity, a compact wide-stopband filtering crossover is presented with more than − 20 dB stopband rejection up to 2.11 f₀ . In order to construct a dual-band filtering crossover topology which has not been reported before, half-mode SIW (HMSIW) cavities are explored to cooperate with the FMSIW cavity, thus leading to a satisfactory dual-passband crossover response for the first time. To validate the design concept, a wide-stopband and a dual-band filtering crossovers are designed, fabricated, and measured. Results exhibit excellent filtering performance and good channel-to-channel isolations over an ultrawide frequency band.

Original language	English
Pages (from-to)	1-12
Number of pages	12
Journal	IEEE Transactions on Microwave Theory and Techniques
Early online date	13 Jul 2023
DOIs	https://doi.org/10.1109/tmtt.2023.3291757
Publication status	E-pub ahead of print - 13 Jul 2023

Keywords

Couplings
Dual band
Dual-band
Electronic mail
Filtering
Microwave filters
Substrates
Topology
filtering crossover
isolation
mixed cavities
orthogonal mode
substrate integrated waveguide (SIW)
wide-stopband

ASJC Scopus subject areas

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/tmtt.2023.3291757

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title = "Design of Wide-Stopband and Dual-Band Filtering Crossovers Based on Mixed Substrate Integrated Waveguide Cavities",

abstract = "This article proposes a new design approach for filtering crossovers featuring wide-stopband and dual-band characteristics based on mixed substrate integrated waveguide (SIW) cavities. The degenerate orthogonal modes in multimode full-mode SIW (FMSIW) square cavities are fully exploited as the cross-unit of dual channels for cross-transmission and good isolation. By developing proper coupling topology between multiple quarter-mode SIW (QMSIW) cavities and the FMSIW cavity, a compact wide-stopband filtering crossover is presented with more than − 20 dB stopband rejection up to 2.11 f0 . In order to construct a dual-band filtering crossover topology which has not been reported before, half-mode SIW (HMSIW) cavities are explored to cooperate with the FMSIW cavity, thus leading to a satisfactory dual-passband crossover response for the first time. To validate the design concept, a wide-stopband and a dual-band filtering crossovers are designed, fabricated, and measured. Results exhibit excellent filtering performance and good channel-to-channel isolations over an ultrawide frequency band.",

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AU - Xu, Bin

AU - Tam, Kam-Weng

AU - Feng, Shuai

AU - Tang, Wanchun

AU - Hong, Jiasheng

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AB - This article proposes a new design approach for filtering crossovers featuring wide-stopband and dual-band characteristics based on mixed substrate integrated waveguide (SIW) cavities. The degenerate orthogonal modes in multimode full-mode SIW (FMSIW) square cavities are fully exploited as the cross-unit of dual channels for cross-transmission and good isolation. By developing proper coupling topology between multiple quarter-mode SIW (QMSIW) cavities and the FMSIW cavity, a compact wide-stopband filtering crossover is presented with more than − 20 dB stopband rejection up to 2.11 f0 . In order to construct a dual-band filtering crossover topology which has not been reported before, half-mode SIW (HMSIW) cavities are explored to cooperate with the FMSIW cavity, thus leading to a satisfactory dual-passband crossover response for the first time. To validate the design concept, a wide-stopband and a dual-band filtering crossovers are designed, fabricated, and measured. Results exhibit excellent filtering performance and good channel-to-channel isolations over an ultrawide frequency band.

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Design of Wide-Stopband and Dual-Band Filtering Crossovers Based on Mixed Substrate Integrated Waveguide Cavities

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Keywords

ASJC Scopus subject areas

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