Design of Tunable Coaxial Bandpass Filter Based on Embedded Stepped Impedance Resonators

Xubin Zhou; Junjie Huo

doi:10.1109/ACCESS.2023.3284462

IEEE Access (Jan 2023)

Design of Tunable Coaxial Bandpass Filter Based on Embedded Stepped Impedance Resonators

Xubin Zhou,
Junjie Huo

Affiliations

Xubin Zhou: ORCiD; School of Electronics and Information Engineering, South China University of Technology, Guangzhou, China
Junjie Huo: ORCiD; School of Electronics and Information Engineering, South China University of Technology, Guangzhou, China

DOI: https://doi.org/10.1109/ACCESS.2023.3284462
Journal volume & issue: Vol. 11
pp. 58947 – 58952

Abstract

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This paper describes a method for designing tunable coaxial bandpass filters based on an inserted coaxial stepped impedance resonator (SIR). The miniaturization of the coaxial resonator is realized by the shape of the stepped impedance structure. In addition, an extended tuning range can be achieved by utilizing the SIR. A third-order tunable bandpass filter with constant absolute bandwidth is designed and fabricated for verification. The fabricated filter exhibits a wide tuning range from 2.13 GHz to 3.54 GHz (52.4%), over which the absolute bandwidth (ABW) varies within 97.5 ± 5.5 MHz (±5.6%).

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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