In this paper the effect of the slot area to an end-coupled bandpass filter (BPF) is presented.
The defected ground structure (DGS) technique is applied in the ground plane to accomplish
the resonant frequency tuning of the filter. To achieve the passband the slot is designed with
the etched DGS pattern consisting of two identical square-loops having open-loop edge
height, h together with open-ends, g and a slot-line, d which forms connection between
them. The proposed dumbbell shaped DGS is used to tune the bandpass filter down to 2.4 …

In this paper the effect of the slot area to an end-coupled bandpass filter (BPF) is presented.
The defected ground structure (DGS) technique is applied in the ground plane to accomplish
the resonant frequency tuning of the filter. To achieve the passband the slot is designed with
the etched DGS pattern consisting of two identical square-loops having open-loop edge
height, h together with open-ends, g and a slot-line, d which forms connection between
them. The proposed dumbbell shaped DGS is used to tune the bandpass filter down to 2.4 …