Reconfigurable Balanced Dualband Bandstop Filter

摘要

This paper introduces a novel architecture ofreconfigurable balanced (differential) dualband bandstop filter(BSF). In differential mode (DM), each symmetrical bisectionof the filter incorporates in-series cascade of two tunabledualband bandstop sections whereas high CMRR is achievedby loading open stubs to the symmetry plane of the branch linestructure. To validate the proposed topology, a microstripprototype is designed and fabricated. Both simulation andmeasured results show a good agreement with each other.