Spurious harmonic suppression in a folded parallel-coupled microstrip bandpass filter by using triangular corrugations

Design of a compact band pass filter using parallel-coupled half-wavelength microstrip resonators with improved stopband skirt characteristics and harmonic suppression is presented in this paper. The proposed filter has fractional bandwidth of 20% subject to design frequency of 5.25 GHz for WLAN app...

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Bibliographic Details
Published in2017 Devices for Integrated Circuit (DevIC) pp. 391 - 395
Main Authors Das, Tarun Kumar, Chatterjee, Sayan
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2017
Subjects
Band-pass filters
bandpass filter
Harmonic analysis
harmonic suppression
Harmonics suppression
Microstrip filters
parallel-coupled lines
Power harmonic filters
Resonator filters
Resonators
triangular corrugations
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Summary:Design of a compact band pass filter using parallel-coupled half-wavelength microstrip resonators with improved stopband skirt characteristics and harmonic suppression is presented in this paper. The proposed filter has fractional bandwidth of 20% subject to design frequency of 5.25 GHz for WLAN applications. Periodic triangular corrugations have been employed in each coupled section of parallel lines for suppression of 2 nd harmonic. Accordingly, 2 nd harmonic suppression of 62.45dB and size reduction of 63% is achieved compared to the conventional parallel-coupled bandpass filter.
DOI:10.1109/DEVIC.2017.8073977