Design of a Planar Wideband Bandstop Filter with High Insertion Loss
Chieh-Hsuan Yang, Cheng‐Han Wu, Ching‐Wen Tang
Abstract
Chieh-Hsuan Yang, Cheng‐Han Wu, Ching‐Wen Tang
Abstract
A compact microstrip bandstop filter is proposed with wider stopband and larger insertion loss. By adopting coupled lines added with open stubs connected at the input and output port of the bandstop filter, the selectivity and stopband rejection can be increased significantly. Moreover, the attenuation level can be controlled by choosing the resonant frequencies of four resonators. This bandstop filter is fabricated with 14.75% fractional bandwidth for measuring at the stopband of 50 dB.
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A compact microstrip bandstop filter is proposed with wider stopband and larger insertion loss. By adopting coupled lines added with open stubs connected at the input and output port of the bandstop filter, the selectivity and stopband rejection can be increased significantly. Moreover, the attenuation level can be controlled by choosing the resonant frequencies of four resonators. This bandstop filter is fabricated with 14.75% fractional bandwidth for measuring at the stopband of 50 dB.
Key concepts: Stopband, Band-stop filter, Insertion loss, Fractional bandwidth, Bandwidth (computing), Materials science, Prototype filter, Microstrip