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- Title
Compact microstrip dual-band bandpass filter and quad-channel diplexer based on quint-mode stub-loaded resonators.
- Authors
Chi-Feng Chen; Guo-Yun Wang; Jhong-Jhen Li
- Abstract
Novel compact microstrip quint-mode multi-stub-loaded resonator has been investigated. Meanwhile, its applications to the dual-band bandpass filter (BPF) and quad-channel diplexer have also been proposed. The proposed dual-band BPF is constructed by a single quint-mode resonator, leading to a very small circuit size. Herein, the first three resonant modes are used to form the first passband, while the other two are used to form the second passband. Besides, the proposed quad- channel diplexer is constructed by two different quint-mode resonators, which also occupies a very small circuit size. In this diplexer design, one of the quint-mode resonator is used to realise the passbands for channels 1 and 3, and the other one is used to realise the passbands for channels 2 and 4. For demonstration, a dual-band BPF operating at 0.9 and 2.2 GHz with a size of 0.17λg×0.23λg and a quad-channel diplexer operating at 0.9, 1.45, 2.1, and 2.7 GHz with a size of 0.28λg×0.23λg have been designed, fabricated, and measured. The electromagnetic simulated and measured results are in good agreement.
- Subjects
BANDPASS filter design &; construction; MICROSTRIP filters; RESONATORS; RESONANCE frequency analysis; MICROWAVE circuits
- Publication
IET Microwaves, Antennas & Propagation (Wiley-Blackwell), 2018, Vol 12, Issue 12, p1913
- ISSN
1751-8725
- Publication type
Article
- DOI
10.1049/iet-map.2018.0079