Band rejection design for Chebyshev modulated dumbbell DGS low pass filters

Dong Hua Yang*, Jeffrey S. Fu, Jui Ching Cheng, Basudeb Ghosh

*Corresponding author for this work

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

1 Scopus citations


The novel technique of band rejection design of Chebyshev dumbbell EBG assisted low pass filters (LPFs) is presented in this paper. The ground plane of a standard 50-ohm transmission line is perturbed by dumbbell electromagnetic bandgap structure (EBG) or called defected ground structure (DGS) to generate ultra rejection band that is beneficial to higher order harmonic suppression. The purpose of the paper is to develop a method to calculate band rejection dependent filling factor (FF) of a Chebyshev modulated dumbbell DGS physical dimension through the use of predefined side lobe level (SLL) rejection ratio, Bragg's theory and Chebyshev polynomial. Unlike that of circular and rectangular EBG cells, the filling factor of dumbbell shaped DGS has been re-defined. The rejection trend under re-defined FF is consistent with the pre-defined SLL. A comparison of Chebyshev circular EBG LPF and proposed Chebyshev dumbbell DGS has been evaluated. The proposed dumbbell DGS LPF has better rejection bandwidth than circular EBG LPF.

Original languageEnglish
Title of host publication4th IEEE International NanoElectronics Conference, INEC 2011
StatePublished - 2011
Event4th IEEE International Nanoelectronics Conference, INEC 2011 - Tao-Yuan, Taiwan
Duration: 21 06 201124 06 2011

Publication series

NameProceedings - International NanoElectronics Conference, INEC
ISSN (Print)2159-3523


Conference4th IEEE International Nanoelectronics Conference, INEC 2011


  • Chebyshev polynomial
  • Side lobe level (SLL)
  • defected ground structure (DGS)
  • rejection bandwidth


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