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- Title
Compact dual-band stepped-impedance resonator filter with separate coupling paths.
- Authors
Chi-Feng Chen; Sheng-Fa Chang; Bo-Hao Tseng; Jun-Hong Weng
- Abstract
A new compact microstrip dual-band bandpass filter (BPF) based on multi-mode λ/4 stepped-impedance resonators (SIRs) with separate coupling paths is investigated. The dual-band BPF with a secondorder bandpass response is composed of only two λ/4 SIRs, resulting in a small circuit size. A coupling gap and a common short-ended stub between the two coupled SIRs are used to create the electric and magnetic couplings with separate coupling paths. The bandwidths of the dual-band BPF can be well controlled by adjusting the coupling strengths of the two coupling paths. Thus, a greater design flexibility for the dual-band BPF can be obtained. For demonstration, a secondorder dual-band BPF with a compact size of 0.14 λg × 0.16 λg has been designed and fabricated. A good agreement is achieved between simulation and measurement.
- Subjects
IMPEDANCE control; RESONATOR filters; ELECTRIC resonators; ELECTRIC filters; HARMONIC oscillators
- Publication
Electronics Letters (Wiley-Blackwell), 2014, Vol 50, Issue 21, p1551
- ISSN
0013-5194
- Publication type
Article
- DOI
10.1049/el.2014.2982