Vol. 25

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New U-Shaped DGS Bandstop Filters

By Jian-Kang Xiao and Yu-Feng Zhu
Progress In Electromagnetics Research C, Vol. 25, 179-191, 2012


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.


Jian-Kang Xiao and Yu-Feng Zhu, "New U-Shaped DGS Bandstop Filters," Progress In Electromagnetics Research C, Vol. 25, 179-191, 2012.


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