Miniaturized cavity filters based on concentric dual-coaxial SIR

Kaijun Song, Jia Liu, Kezhou Pu and Jialin Hu

Journal of Electromagnetic Waves and Applications, 2022, vol. 36, issue 17, 2483-2495

Abstract: Two concentric dual-coaxial SIR filters with different structures are proposed. The first is that the upper resonant cap wraps the lower resonant cap; the second is that the cap of the upper resonator no longer wraps the lower resonator. The dual-coaxial quarter-wavelength SIR structure improves the anti-vibration capability of the resonator, and the structure makes full use of the resonator space and improves the unloaded Q value. The insertion loss of the first filter is less than 0.3 dB, and the insertion loss of the second filter is less than 1.5 dB.

Date: 2022
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DOI: 10.1080/09205071.2022.2089917

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