Uniplanar compact wideband bandstop filter

A uniplanar wideband bandstop filter is proposed using two bent open-end stubs. The proposed filter consists of the bent connecting line of (lambda)g/2 between two bent (lambda)g/4 stubs, which results in wideband design with a rejection bandwidth of 90% at 2.05 GHz. Further, the connecting line and stubs have the same characteristic impedance. The proposed filter compared to the conventional one is also more compact. The area of the novel filter is ((lambda)g/4)^2 at the center frequency of the stopband, while the area of the filter realized using the nonbent stubs and connecting line is 2((lambda)g/4)^2 for the same stopband characteristics.