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AN ULTRA-WIDEBAND BALANCED BANDPASS FILTER BASED ON DEFECTED GROUND STRUCTURES

By B. Xia, L.-S. Wu, and J.-F. Mao

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Abstract:
An ultra-wideband (UWB) balanced bandpass filter (BPF) is proposed and designed using defected ground structures (DGSs). A multimode resonator on top layer with a coplanar waveguide on bottom layer is used to design a UWB BPF. U-shaped and H-shaped DGSs loaded with capacitor are used to design to provide common mode rejection within a lower band, while a set of dumbbell-shaped DGSs are utilized to provide common mode rejection within an upper-band. The proposed UWB balanced BPF shows the performance of good common mode rejection in and out of the UWB passband.

Citation:
B. Xia, L.-S. Wu, and J.-F. Mao, "An Ultra-Wideband Balanced Bandpass Filter Based on Defected Ground Structures," Progress In Electromagnetics Research C, Vol. 25, 133-144, 2012.
doi:10.2528/PIERC11082503

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