Non-uniform DGS low pass filter with ultra-wide stopband

Jian Kang Xiao*, Yu Feng Zhu, Jeffrey S. Fu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

12 Scopus citations

Abstract

New low pass filters with ultra-wide stopband by using dumbbell defected ground structures (DGSs) with size reduction are presented in this paper. Non-uniform DGSs etched under a stepped-impedance microstrip line are developped to get better filter performances of transmission zeros, enhanced return loss and ultra-wide stopband that is beneficial to higher order harmonic suppression. A comparison of low pass filters between standard 50-ohm microstrip line and stepped-impedance microstrip line has been evaluated, respectively. The proposed low pass filter with non-uniform dumbbell DGSs and stepped-impedance microstrip line has better performances than that with uniform DGSs and uniform microstrip line, and simultaneously, DGS units are decreased and which brings a smaller circuit size. The design is demonstrated by measurement.

Original languageEnglish
Title of host publication2010 9th International Symposium on Antennas Propagation and EM Theory, ISAPE 2010
Pages1216-1219
Number of pages4
DOIs
StatePublished - 2010
Event2010 9th International Symposium on Antennas Propagation and EM Theory, ISAPE 2010 - Guangzhou, China
Duration: 29 11 201002 12 2010

Publication series

Name2010 9th International Symposium on Antennas Propagation and EM Theory, ISAPE 2010

Conference

Conference2010 9th International Symposium on Antennas Propagation and EM Theory, ISAPE 2010
Country/TerritoryChina
CityGuangzhou
Period29/11/1002/12/10

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