New Compact Triple-Passband Bandpass Filter Using Multipath-Embedded Stepped Impedance Resonators

作者：Wu Hung Wei^*; Chen Guan Syun; Chen Yung Wei

来源：IEEE Microwave and Wireless Components Letters, 2014, 24(3): 158-160.

DOI：10.1109/LMWC.2013.2293652

• Bandpass filter (BPF)
• multipath
• stepped impedance resonator (SIR)
• triple-passband

This letter presents a new resonator configuration to design a triple-passband filter with high passband selectivity and compact circuit size. The filter includes two multipath-embedded stepped impedance resonators (SIRs), connected with magnetically coupling by via hole technique at the symmetric plane of the filter. The multipath-embedded SIR is designed at 1.575, 2.45, and 3.5 GHz. The resonant frequencies can be easily controlled by tuning impedance ratio K-i and length ratio alpha(i) (where i = 1, 2, and 3) of the multipath-embedded SIR. This study provides an effective method to easily design the triple-passband filter with compact circuit size, high passband selectivity and low insertion loss.

• 出版日期2014-3