A NOVEL DUAL-BAND BANDPASS FILTER USING GENERALIZED TRISECTION STEPPED IMPEDANCE RESONATOR WITH IMPROVED OUT-OF-BAND PERFORMANCE

Xiaofeng Sun, Eng Leong Tan
2011 Progress In Electromagnetics Research Letters  
This paper presents the synthesis of a novel dual-band bandpass filter with improved out-of-band performance. The proposed circuit is constructed by cascading a dual-band filter using trisection stepped impedance resonators (SIRs) and an L-C ladder lowpass filter using open-circuited stubs. The dual-band trisection SIR can provide the desired dual-band response, and the lowpass filter can improve the out-of-band performance by suppressing the harmonics and spurious responses. The proposed
more » ... The proposed filter has been fabricated and measured. Simulation and measurement results are found to be in good agreement.
doi:10.2528/pierl10120606 fatcat:kqw24dgt6jhyzlwxx7gyolecra