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- Title
A balanced dual‐band bandpass filter with a wide stopband and controllable differential‐mode frequencies and fractional bandwidths.
- Authors
Xu, Le; Yue, Hao J.; Wei, Feng; Shi, Xiao W.
- Abstract
In this article, a balanced microstrip dual‐band bandpass filter (BPF) is designed. The proposed filter is achieved by employing a microstrip U‐shape half‐wavelength resonator, a folded stub‐loaded resonator and balanced microstrip/slotline transition structures. The center frequencies and the fractional bandwidths of the two differential‐mode (DM) passbands can be controlled independently by changing the physical lengths of the two resonators and the gaps between each resonator, respectively. The balanced microstrip/slotline transition structures can achieve a wideband common‐mode (CM) suppression. Meanwhile, the DM passbands are independent from the CM responses, which significantly simplify the design procedure. In addition, a wide DM stopband is also realized. In order to validate the design strategies, a balanced dual‐band BPF centered at 2.57 and 3.41 GHz was fabricated and a good agreement between the simulated and measured results is observed.
- Subjects
BANDPASS filters; MICROSTRIP resonators; BANDWIDTHS; MICROSTRIP transmission lines; RESONATORS
- Publication
International Journal of RF & Microwave Computer-Aided Engineering, 2020, Vol 30, Issue 1, pN.PAG
- ISSN
1096-4290
- Publication type
Article
- DOI
10.1002/mmce.22013