A wide stopband CPW low pass filter using quarter wavelength stepped impedance resonators

A novel wide stopband coplanar waveguide (CPW) low pass filter (LPF) using quarter wavelength stepped impedance resonators (SIR) is presented. The bandstop characteristics of the quarter wavelength short circuited stubs SIR are demonstrated. By cascading three tapered quarter wavelength short circui...

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Bibliographic Details
Published in2010 International Conference on Microwave and Millimeter Wave Technology pp. 62 - 65
Main Authors Hao-Jia Lin, Xiao-Qun Chen, Xiao-Wei Shi, Lei Chen, Yan-Fu Bai
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2010
Subjects
Attenuation
Circuit simulation
Coplanar waveguides
Electromagnetic waveguides
Frequency
Impedance
Low pass filters
Periodic structures
Spurline
Wavelength measurement
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Summary:A novel wide stopband coplanar waveguide (CPW) low pass filter (LPF) using quarter wavelength stepped impedance resonators (SIR) is presented. The bandstop characteristics of the quarter wavelength short circuited stubs SIR are demonstrated. By cascading three tapered quarter wavelength short circuited stubs SIR and a CPW spurline resonator, the fabricated low pass filter has sharp rejection with cutoff frequency of 3.5 GHz, and deep attenuation from 3.7 GHz to 11 GHz lower than -24 dB. Good agreement between simulated and measured results is demonstrated.
ISBN:9781424457052
142445705X
DOI:10.1109/ICMMT.2010.5525289