A novel crossed resonator and its applications to bandpass filters

作者：Chu, Qing-Xin^*; Chen, Fu-Chang; Tu, Zhi-Hong; Wang, Huan

• Cascaded triplet (CT)
• Cascaded-triplet filters
• Microstripes
• Resonance frequencies
• Stub-loaded resonators
• Transmission line modeling
• Tri-band bandpass filter
• Tri-bands

A novel open and short stubs loaded crossed resonator and its applications to cross-coupling filter and tri-band bandpass filters are presented in this paper. Based on the lossless transmission line model analysis, it is found that the first three resonance frequencies of the crossed resonator can be conveniently controlled. Benefiting from this feature, the resonator can be utilized to design not only a cascaded triplet (CT) filter, but also a tri-band bandpass filter. The tri-band filter offers two tunable passbands and one fixed passband. The first and third passband frequencies can be tuned effectively by changing the lengths of the stubs. To demonstrate these applications, a CT filter and two tri-band bandpass filters using a crossed resonator are implemented. The experiments verify the theoretical predictions and simulations.

• 出版日期2009
• 单位华南理工大学