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NEW U-SHAPED DGS BANDSTOP FILTERS

By J.-K. Xiao and Y.-F. Zhu

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Abstract:
In this paper, new microstrip bandstop filters with single band, dual-band and tri-band by using U-shaped defected ground structures are presented without the assistance of coupled lines or certain resonators, and the application of DGS is developed. The proposed bandstop filters have good performances of low loss, multi-band operation, transmission zeros which improve the filter frequency selectivity, and miniaturization because of the cascade of DGS and minimum defected patterns which reduce the circuit size. The new designs are demonstrated by measurement.

Citation:
J.-K. Xiao and Y.-F. Zhu, "New U-Shaped DGS Bandstop Filters," Progress In Electromagnetics Research C, Vol. 25, 179-191, 2012.
doi:10.2528/PIERC11091805

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