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Uniplanar compact wideband bandstop filter

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2 Author(s)
Gorur, A. ; Dept. of Electr. & Electron. Eng., Pamukkale Univ., Denizli, Turkey ; Karpuz, C.

A uniplanar wideband bandstop filter is proposed using two bent open-end stubs. The proposed filter consists of the bent connecting line of /spl lambda//sub g//2 between two bent /spl lambda//sub 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 (/spl lambda//sub g//4)/sup 2/ at the center frequency of the stopband, while the area of the filter realized using the nonbent stubs and connecting line is 2(/spl lambda//sub g//4)/sup 2/ for the same stopband characteristics.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:13 ,  Issue: 3 )