Title :
A novel cross-shape DGS applied to design ultra-wide stopband low-pass filters
Author :
Chen, Han-Jan ; Huang, Tsung-Hui ; Chang, Chin-Sheng ; Chen, Lih-Shan ; Wang, Na-Fu ; Wang, Yeong-Her ; Houng, Mau-Phon
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
fDate :
5/1/2006 12:00:00 AM
Abstract :
This letter presents a novel low-pass filter with an ultra-wide stopband. The proposed filter is comprised of a new cross-shape defected ground structure (CSDGS). By using this structure, the filter not only supports conventional DGS performances with a sharp rejection, but also exhibits an ultra-wide stopband. For the deigned low-pass filter, an insertion loss of less than 2dB from dc to 3.5GHz and the rejection is better than 20dB from 4.3 to 15.8GHz. Predicted performances show widened and deepened stopband beyond the low passband. Furthermore, it is confirmed by measurement.
Keywords :
UHF filters; band-stop filters; low-pass filters; microwave filters; 0 to 3.5 GHz; 4.3 to 15.8 GHz; cross-shape defected ground structure; low-pass filters; stopband filters; ultra-wideband filters; Band pass filters; Cutoff frequency; Insertion loss; Low pass filters; Metamaterials; Microstrip filters; Passband; Periodic structures; Power harmonic filters; Resonator filters; Cross-shape; defected ground structure (DGS); low-pass; stopband; ultra-wide;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2006.873594
