Three-Dimensional Printed Dual-Band Filter Based on SIR-Loaded Sleeve Coaxial Resonant Cavity

Zhanzhi Liu; Gang Zhang; Xin Zhou; Shuai Feng; Kam-Weng Tam; Jiasheng Hong

doi:10.1109/lmwt.2025.3588730

Three-Dimensional Printed Dual-Band Filter Based on SIR-Loaded Sleeve Coaxial Resonant Cavity

Zhanzhi Liu, Gang Zhang, Xin Zhou, Shuai Feng, Kam-Weng Tam, Jiasheng Hong

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Abstract

In this letter, a dual-band filter based on a stepped impedance resonator (SIR)-loaded sleeve coaxial resonant cavity (SCRC) has been proposed for the first time. The high-order spurious modes can be suppressed when the sleeve is closer to the center metal cylinder. In addition, by designing the cylinder as an SIR structure, dual controllable passbands can be generated without enlarging the original volume. To validate the feasibility of the proposed method, a dual-band filter prototype with wide stopband is fabricated by multijet printing (MJP) 3-D printing technology. The measured results exhibit good consistency with the simulated ones, demonstrating the advantages of the dual operation passbands and wide-stopband performance.

Original language	English
Pages (from-to)	1692-1695
Number of pages	4
Journal	IEEE Microwave and Wireless Technology Letters
Volume	35
Issue number	11
Early online date	4 Aug 2025
DOIs	https://doi.org/10.1109/lmwt.2025.3588730
Publication status	Published - Nov 2025

Keywords

3-D printing
bandpass filter (BPF)
dual band
miniaturization
stepped impedance resonator (SIR)-loaded sleeve coaxial resonant cavity (SCRC)
wide stopband

ASJC Scopus subject areas

Condensed Matter Physics
Electrical and Electronic Engineering

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Cite this

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title = "Three-Dimensional Printed Dual-Band Filter Based on SIR-Loaded Sleeve Coaxial Resonant Cavity",

abstract = "In this letter, a dual-band filter based on a stepped impedance resonator (SIR)-loaded sleeve coaxial resonant cavity (SCRC) has been proposed for the first time. The high-order spurious modes can be suppressed when the sleeve is closer to the center metal cylinder. In addition, by designing the cylinder as an SIR structure, dual controllable passbands can be generated without enlarging the original volume. To validate the feasibility of the proposed method, a dual-band filter prototype with wide stopband is fabricated by multijet printing (MJP) 3-D printing technology. The measured results exhibit good consistency with the simulated ones, demonstrating the advantages of the dual operation passbands and wide-stopband performance.",

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AU - Zhang, Gang

AU - Zhou, Xin

AU - Feng, Shuai

AU - Tam, Kam-Weng

AU - Hong, Jiasheng

PY - 2025/11

Y1 - 2025/11

N2 - In this letter, a dual-band filter based on a stepped impedance resonator (SIR)-loaded sleeve coaxial resonant cavity (SCRC) has been proposed for the first time. The high-order spurious modes can be suppressed when the sleeve is closer to the center metal cylinder. In addition, by designing the cylinder as an SIR structure, dual controllable passbands can be generated without enlarging the original volume. To validate the feasibility of the proposed method, a dual-band filter prototype with wide stopband is fabricated by multijet printing (MJP) 3-D printing technology. The measured results exhibit good consistency with the simulated ones, demonstrating the advantages of the dual operation passbands and wide-stopband performance.

AB - In this letter, a dual-band filter based on a stepped impedance resonator (SIR)-loaded sleeve coaxial resonant cavity (SCRC) has been proposed for the first time. The high-order spurious modes can be suppressed when the sleeve is closer to the center metal cylinder. In addition, by designing the cylinder as an SIR structure, dual controllable passbands can be generated without enlarging the original volume. To validate the feasibility of the proposed method, a dual-band filter prototype with wide stopband is fabricated by multijet printing (MJP) 3-D printing technology. The measured results exhibit good consistency with the simulated ones, demonstrating the advantages of the dual operation passbands and wide-stopband performance.

KW - 3-D printing

KW - bandpass filter (BPF)

KW - dual band

KW - miniaturization

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KW - wide stopband

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JF - IEEE Microwave and Wireless Technology Letters

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ER -

Three-Dimensional Printed Dual-Band Filter Based on SIR-Loaded Sleeve Coaxial Resonant Cavity

Abstract

Keywords

ASJC Scopus subject areas

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